The Russian aeroplane flew low beneath the broken clouds, its little rotary engine buzzing steadily through the damp summer air. It was a Morane-Saulnier G, one of the light two-seat monoplanes the Imperial Russian Army had begun using for reconnaissance. By the standards of 1914 it was a respectable machine, built from timber, wire and stretched canvas, with an open cockpit shared by a pilot and observer and enough endurance to spend hours following roads, railway lines and troop movements. It was not built to climb particularly high, however, and shortly before midday it was moving north from Russian Poland at only a few thousand feet, low enough for the observer to distinguish individual wagons upon the road below.
He had expected to find an army advancing.
Instead, he found one running away.
The observer leaned over the side of the cockpit and raised his binoculars. The same road that had carried Russian troops north toward Soldau only the day before was now black with men flowing south. Infantry crowded around wagons, officers forced exhausted horses through masses of soldiers, and Cossacks rode wherever they could find enough space to pass. Wounded men clung to carts already overloaded with ammunition boxes, baggage and whatever equipment had been rescued from the retreat, while abandoned guns and broken wagons littered the roadside wherever teams had failed or wheels had sunk too deeply into the mud.
There were no proper columns anymore, no intervals between formations and scarcely any sign of organised movement. Men simply ran. From above they resembled ants pouring along a trail after someone had kicked apart the nest, thousands upon thousands streaming toward Russian Poland while smoke hung across the countryside behind them in the direction of Soldau.
The observer slowly lowered his binoculars. Something had happened there. Something terrible.
He struck the pilot on the shoulder and pointed south, shouting over the engine that they had seen enough. Whatever had happened to the western flank of the Second Army needed to reach headquarters immediately. The pilot looked down once, seemed to understand the same thing, and began banking the Morane toward home.
Neither man looked above them.
High within the broken clouds, something dark moved. For several seconds it was little more than a shadow against the grey. Then it tipped forward and descended.
The German F-1 came out of the clouds like a hawk dropping upon a small bird that had never known it was being hunted.
The Russian observer saw it only at the last moment. He twisted around in his seat and stared upward as the German fighter grew with horrifying speed behind them. Compared with the delicate Morane, the F-1 looked squat, muscular and predatory, a compact biplane built around a powerful radial engine, its broad wings marked with the black crosses of Imperial Germany. Its fixed undercarriage hung beneath it, the open cockpit sat close behind the engine, and directly ahead of the pilot rested a pair of synchronized machine guns aimed through the spinning arc of the propeller.
"German!"
The warning disappeared beneath the roar of the engines.
The Russian pilot immediately hauled the Morane into a turn, hoping perhaps to force the attacker past, but the manoeuvre only demonstrated how unequal the contest was. The German rolled after him almost effortlessly. The Russian tightened the turn; the F-1 tightened with him. The Morane strained through the air while the German fighter seemed to curl around it, agile enough that every attempt to escape merely brought the black crosses closer.
Within seconds the F-1 had settled neatly behind the Russian tail. Its young pilot waited until the Morane filled his sights.
Then he fired.
The two synchronized machine guns hammered together, sending a stream of bullets cleanly through the spinning propeller arc. Canvas ripped from the Russian wing in fluttering strips as wooden spars burst beneath the impacts. The burst crossed the rear cockpit first. The observer jerked violently, blood whipping away into the slipstream, before the remaining rounds tore into the pilot and the front of the aircraft.
The Morane continued flying for perhaps another second, as though the machine itself had not yet realised both of its crew were dead. Then the damaged wing twisted beneath the strain. The aircraft rolled onto its side, dropped its nose and began falling toward the countryside below, shedding fabric and splintered wood as it descended.
The German pilot watched it all the way down.
The Morane struck a field beside the crowded road and shattered against the earth. Its remaining fuel spilled through the wreckage, and moments later orange flame blossomed across the broken fuselage.
Only then did the F-1 level out.
Manfred von Richthofen stared down at the burning wreckage for a moment before a broad grin spread across his face.
"Ha!"
The shout vanished into the wind, but that hardly mattered. His heart was hammering with exhilaration as he felt the controls alive beneath his hands and the radial engine roaring only metres ahead of him. This was nothing like cavalry school, nothing like endless drills, polished boots, stable inspections and riding in formation beneath the watchful eyes of instructors.
This was speed.
This was freedom.
And God, he loved this machine.
Richthofen laughed to himself, reached down beside his seat and pulled free the little notebook he had brought for precisely this purpose. With one gloved hand he made a single mark upon the page.
One.
His first aerial victory.
He admired it for scarcely a second before closing the notebook and putting it away again. There would be time to celebrate later. For now he was still on patrol, and the Russians below had given him something considerably larger to occupy his attention.
Richthofen looked over the side of the cockpit.
The road seemed almost alive. Russian troops covered it for kilometres, so numerous from this height that they truly did resemble insects following some enormous trail. Infantry, cavalry, horses and wagons all pushed south together, the whole mass flowing away from the smoke hanging over Soldau.
Most of the Black Legion's newest F-2 fighters had been sent east, where the main air effort was concentrated against Rennenkampf's First Army. Older F-1s such as Richthofen's had therefore been left scattered across the southern sector for patrols, reconnaissance and attacks against whatever Russian aircraft or exposed formations presented themselves.
Older or not, the little fighter was more than enough for this.
Richthofen pushed the control column forward and the nose dropped. The engine note sharpened as the F-1 descended, gathering speed until the wind screamed around the cockpit and the road below seemed to rush upward to meet him. Individual wagons became distinct, then horses, then men. Richthofen lined the aircraft along the road and continued downward until the treetops themselves seemed dangerously close beneath his wings.
The Russians heard him coming.
Heads turned upward throughout the column. Men pointed, officers shouted, and then the sheer speed of the approaching machine began to register. Some soldiers immediately threw themselves toward the ditches, while others simply stood staring at the strange little biplane plunging out of the sky toward them.
One man pointed frantically.
"Devil! A German devil!"
A soldier beside him looked upward in confusion, and roared.
"It's an aeroplane, you fool! Run!"
By then it scarcely mattered what they called it.
Richthofen levelled out just above the trees and pressed the triggers, and both machine guns opened.
The road tore apart beneath him. Bullets walked through the retreating column in a savage moving line. Men collapsed in mid-stride or pitched face-first into the mud. A horse screamed and went down in its traces, dragging its wagon sideways until the vehicle overturned across the road and spilled wounded soldiers beneath its wheels. Men abandoned rifles, packs and carts and hurled themselves into the ditches while others sprinted blindly for the trees, trampling over those who had already fallen in their path.
Richthofen could not help himself.
He cheered.
"YES!"
The sound was swallowed by his own engine and the hammering guns as the F-1 screamed over the Russians, so low that several men instinctively ducked beneath it. A few raised rifles and fired wildly after him, but Richthofen was already beyond them, climbing hard as the road disappeared behind his tail.
He banked sharply over the countryside, the little biplane turning with the eagerness of a hunting bird preparing to come around again.
Below, the Russians slowly lifted their heads.
Some stared after the German aircraft in terror. Others scarcely bothered. They simply dragged themselves from the ditches, found the road again and continued running south.
The aeroplane frightened them, but what followed frightened them far more.
The Iron Prince was coming.
Oskar rode near the head of the pursuit, Shadowmane pounding south along the same road the Russians had marched north only a day earlier. Yesterday it had carried an army confidently into East Prussia. Now it was choked with the broken remnants of that army fleeing toward the frontier, discarded rifles, packs and equipment marking their retreat through the mud.
Behind them came the Black Legion.
Stories of Soldau had already spread through the retreating Russians: of the black giant who could not be killed, the demon who had ridden alone into their ranks, the Steel Reaper whose sword passed through men like wheat. Whatever name they used, the effect was much the same. Whenever a soldier looked back through the rain and saw the enormous black horse gaining behind him, he somehow found strength to run faster.
Shadowmane thundered through the retreat with blood-stained bandages wrapped around his wounded forelegs, his black barding still dented and scarred from the morning's battle. Above him rode Oskar in skeletal steel, his red cloak dark with rain and blood while the enormous sword in his hands rose and fell with dreadful regularity.
A Russian looked back too late.
Oskar swung.
The blade crossed the man's back and passed completely through him, the force of the stroke sending his upper body spinning toward the roadside while his legs managed one final stumbling step before collapsing beneath him.
Shadowmane never slowed.
Another soldier stood directly in their path with his rifle already discarded and both hands raised above his head. His mouth was open, perhaps begging, perhaps trying to surrender, but Oskar could hear nothing beneath the engines, gunfire and pounding hooves.
The sword came down.
Another body disappeared behind them.
A mounted officer farther ahead tried to wrench his horse from the road, perhaps hoping to rally some of the fleeing infantry around him, perhaps simply desperate to escape into the fields. Shadowmane reached him before either possibility mattered. The smaller Russian horse screamed and reared at the sight of the colossal black stallion bearing down upon it, and Oskar aimed his blow for the rider.
The animal moved at the last instant.
The sword struck both.
The officer vanished from the saddle in a violent burst of blood. The blade continued through the horse's neck and shoulder with horrifying ease, and for one grotesque instant the rider was thrown sideways with one hand still twisted in the reins as the severed head went with him. Horse and man crashed into the ditch together, the animal's remaining legs folding beneath its collapsing weight.
Oskar's stomach tightened.
He had meant to strike only the officer.
The man had chosen his profession. Whatever else might be said of him, he had ridden north armed and had knowingly participated in the invasion of Germany. The horse had chosen nothing. It had gone where the reins pulled it, carried the weight placed upon its back and died because human beings had decided upon war.
Oskar hated killing animals most of all.
There was no time to dwell upon it.
Shadowmane was already carrying him onward, and the road ahead remained filled with men.
The sight of the Prince approaching finally broke what little order remained among many of them. Russians spilled from the road in every direction, scrambling over ditches, throwing themselves through hedges and sprinting across the fields like insects scattering beneath an approaching boot. Others vanished down farm tracks or plunged into the forests, convinced that the trees might hide them from the thing advancing behind.
The faster elements of the Black Legion spread after them like hunting hounds released from their leash.
Motorcycles raced along the road and secondary tracks, some drawing almost level with Shadowmane before surging ahead. Their drivers hunched over the handlebars while gunners twisted in their sidecars and opened fire, machine guns hammering into the fleeing Russians farther down the road. Men pitched forward or tumbled into the ditches as the machines swept past, only for the motorcycles to vanish around the next bend in search of another group.
The armoured trucks followed, their heavy six-wheeled bodies breaking from the road wherever the fields offered firm enough ground. Roof-mounted machine guns swept across Russians attempting to reach the woods, bullets kicking through grass and bodies alike as the vehicles lumbered after them.
Those who reached the forest discovered that the hunt did not end beneath the trees.
The trucks halted along the edge of the woods, rear doors opened, and Black Legion infantry jumped down with carbines and light machine guns ready. Squads disappeared between the trunks after the fleeing Russians, and moments later the forest began to echo with scattered shots, short automatic bursts and screams muffled by branches and rain.
Then, gradually, the firing diminished.
The trucks moved on.
Where larger groups of Russians managed to gather themselves and remember that they were still soldiers, the Panzers followed.
The tanks came more slowly, tracks grinding through mud, fences and abandoned equipment as they pushed wherever the woods and roads allowed. Their machine guns searched the tree lines while the short 37-millimetre cannon dealt with anything substantial enough to threaten the advance. A knot of Russians trying to build a defensive position around a wagon or surviving field gun might hold for minutes against infantry.
Against a Panzer, they often received only seconds.
The whole countryside had become part of the pursuit.
The roads were killing lanes. The fields exposed men to motorcycles and machine guns. The forests merely changed which Germans followed them inside.
Oskar could see only fragments of what was happening around him. The pursuit spread across roads, fields and woodland on both sides, much of it hidden behind smoke, trees and the broken contours of the countryside. Yet he could hear it everywhere—the hard chatter of machine guns, rifle shots cracking beneath the trees, engines roaring across muddy ground, horses screaming and men shouting in German and Russian until the sounds tangled together into one endless noise.
Then even his immediate view of the road disappeared beneath blood.
Shadowmane caught a Russian trying to cut across their path, lunging sideways with a violence that seemed almost unnatural for an animal of his size. His jaws closed high around the man's shoulder and upper chest, crushing cloth and flesh together before lifting him almost completely from the ground. The Russian screamed and struck uselessly at the stallion's armoured head, but Shadowmane merely twisted his neck and flung him upward.
Oskar reacted before thought could intervene.
The enormous sword swept across, and the Russian came apart in mid-air. The blade struck him through the middle with such force that the two halves seemed to separate before Oskar had even finished the swing. Blood burst outward in a great red sheet, followed by pieces of cloth, flesh and shattered equipment. The upper half of the man spun away toward the ditch while everything below the cut vanished beneath Shadowmane's stride.
For an instant Oskar saw nothing.
Blood struck the skull helm hard enough to sound almost like rain. It covered the black eye sockets, splashed across his breastplate and soaked the front of his already darkened cloak. Something soft struck his shoulder and remained there for several seconds before sliding slowly down the armour.
Behind the mask, Oskar blinked into red.
He wiped one gauntleted hand across the eye openings, smearing the blood rather than clearing it completely, and heard laughter somewhere beside him.
A motorcycle had drawn level with Shadowmane. The driver was hunched low over the handlebars while the man in the sidecar stared upward at Oskar with wide eyes and something approaching disbelief.
"God Almighty!" the gunner shouted. Then his face split into a savage grin.
"For the Iron Prince!"
He swung his machine gun forward and opened fire again, the weapon hammering into a group of Russians scrambling along the roadside. Men folded beneath the burst as the motorcycle accelerated past them.
More voices rose from behind.
"No mercy for the invaders!"
"Run, you bastards! Go back to your bear loving Tsar!"
Someone aboard an armoured truck laughed as its roof gun fired across a field. Another soldier answered with a cheer, while somewhere farther behind the deeper crack of a Panzer's 37-millimetre gun rolled across the countryside.
Others made no sound at all. They simply fired, reloaded and continued. There was something almost worse about those men.
Oskar said nothing. He wiped the blood from the eye sockets of his helm and kept Shadowmane moving.
God, he hated this.
The Russians were no longer fighting so much as running, and the Black Legion was hunting them through roads, fields and forests. There was nothing honourable about it.
But Oskar would not stop.
He had spent years trying to rule through affection, prosperity and reason. As the People's Prince, Oskar had built companies, improved agriculture, created medicines and machines, and done more good for Germany—and perhaps for the world—than most princes could ever hope to accomplish. Some part of him had believed that goodwill, combined with a strong and prosperous Germany, might be enough to keep Europe from destroying itself.
Clearly, it had not been.
Love alone was not enough to rule men, just as kindness alone was not enough to preserve order. There had to be balance. A ruler should be loved where love was possible and respected where it was not. If respect failed, then there remained fear—but never hatred if it could be avoided. Hatred endured. Fathers passed it to sons, and men who hated deeply enough would suffer almost anything simply for the chance to strike back.
Fear was different. Fear established boundaries. It taught men that certain lines existed and that crossing them brought consequences.
That was the purpose of the Iron Prince.
Oskar's rules would be simple. Live peacefully and he had no quarrel with you. Disagree with him, curse him, petition him for change, even despise him if that was your choice. None of those things required blood.
But take up arms against him, against Germany, against his family or anyone beneath his protection, and the rule changed.
Then mercy was no longer something that could simply be demanded after the killing had begun.
A soldier aiming a rifle at him was still trying to kill him, and Oskar saw no reason why a uniform should make that act morally different. One man attempting murder and ten thousand men doing the same beneath a flag were, in the end, still choosing violence with the intent to kill.
If an enemy laid down his arms before joining the fight, perhaps mercy remained possible. But once a man had knowingly crossed that line and taken up arms against him or his people, Oskar believed the consequence had to be absolute.
Death.
It was harsh. Perhaps even tyrannical.
But if Oskar truly intended someday to end the cycle of war rather than merely survive another turn of it, then he could not afford to draw boundaries he was unwilling to enforce. Better, he thought, to strike terribly and decisively at the beginning than to inflict a thousand lesser wounds across decades of rebellion, revenge and renewed war.
That was what Russia would learn now.
He would not give its armies time to recover, reorganise and turn this campaign into another endless slaughter. He would drive south as quickly as the Black Legion could follow, seize Warsaw and the lands around it if the opportunity presented itself, and continue until Russia understood that the war it had begun could no longer be won.
Perhaps conquered peoples would fear him before they ever learned to trust him. Perhaps that was unavoidable. Love could come later, slowly, if his rule proved worthy of it.
For now, the line had to be drawn.
The People's Prince would remain for those who lived beneath his protection.
The Iron Prince would be what awaited those who chose to challenge it.
One terrible blow now, Oskar told himself, rather than a thousand blows scattered across another century.
Then perhaps the peace he had dreamed of across two lives might finally become possible: one world beneath an authority strong enough that nations could no longer slaughter one another whenever ambition demanded it.
Perhaps someone would eventually have to stand at the centre of that world.
And perhaps, whether he had wanted it or not, this war was forcing Oskar to consider that the man might have to be him.
Oskar's thoughts were broken by a sudden shift beneath him.
The road ahead had almost emptied. Two motorcycles and one of the Black Legion's six-wheeled armoured trucks had already raced ahead, scattering the last Russians before them and leaving the country road littered with bodies, abandoned equipment and men who had been shot or crushed beneath wheels. Their engines faded as they disappeared around the next bend, where the road narrowed between thicker walls of forest.
Shadowmane should have followed.
Instead, the stallion veered sharply left.
Oskar felt the movement through the saddle before he understood its purpose. Shadowmane left the centre of the road at a hard gallop and angled towards an overturned Russian wagon lying half in the ditch. One wheel had shattered, boxes and canvas bags scattered around it, and beside the wreckage a Russian soldier was dragging himself through the mud with both hands.
His legs no longer worked.
From the mangled state of his lower body, one of the armoured trucks had already run across him. He was finished as a fighting man, probably finished altogether, able to do little more than crawl a few miserable metres before blood loss or shock took him.
The Russian heard the approaching hooves and looked back.
His eyes widened.
Oskar realised what Shadowmane was doing.
"Shadow—"
Too late.
The enormous stallion drove straight over him.
One iron-shod hoof struck between the man's shoulders with a wet crack and flattened him into the road. Shadowmane deliberately planted another stride through the body, crushing what remained beneath his weight before surging back towards the centre of the track.
Oskar twisted in the saddle and stared behind them.
The Russian did not move.
For several seconds Oskar said nothing.
That had not been an accident.
He could feel it.
There had been purpose in the turn, purpose in the charge, and something hot and ugly behind it that Oskar recognised immediately.
Rage.
Shadowmane remembered Soldau.
He remembered the grey-green uniforms surrounding him, the rifles cracking against his armour and the Maxim rounds tearing through the gaps around his forelegs until his body had finally collapsed beneath Oskar. Whatever strange intelligence had been growing inside the great stallion over the years, it had advanced far beyond merely recognising friend from stranger.
Shadowmane knew who the enemy was.
And apparently he hated them.
Oskar stared down at the black mane whipping beneath him.
"God damn, Shadow."
The stallion snorted and continued galloping as though he had done nothing remarkable.
Oskar slowly shook his head.
He had seen Shadowmane kill before. He had watched him bite men, trample soldiers and crush bodies beneath his hooves at Soldau. But those deaths had happened in battle, amid men attacking them from every direction.
This had been different.
That Russian had posed no threat whatsoever. Shadowmane had gone out of his way to kill him.
Revenge.
Somewhere in that enormous black head, the horse had made the decision entirely for himself.
"You're becoming a savage," Oskar muttered.
Shadowmane's ears flicked back towards him. Despite himself, Oskar almost smiled, almost.
Then he remembered the broken man disappearing beneath those hooves, and whatever amusement might have existed vanished.
Even his horse was changing.
War had been raging for only days, and already Shadowmane seemed capable of hatred. What would another month make of him? Six months? Years?
Oskar looked briefly towards the grey sky.
Please, God. Let this end quickly.
He had no desire to discover whether the enormous black stallion beneath him might someday deserve to be called a horse of death in more than appearance.
Nor, for that matter, did Oskar particularly wish to discover what endless war might turn him into.
He lowered his gaze towards the road again.
The engines ahead were already growing distant. Russians still fled somewhere beyond the bend, and Russian Poland waited farther south.
But he also noticed that Shadowmane was slowing.
The change was slight at first, little more than an unevenness beneath the saddle, but Oskar knew the stallion too well to miss it. Blood had begun soaking through the fresh dressings around his wounded forelegs again, and although Shadowmane still drove himself south after the retreating Russians with the same stubborn fury as before, each mile was costing him more.
Oskar eased the reins.
"Enough soon, old friend."
Shadowmane snorted as though insulted by the suggestion.
Oskar almost smiled. The horse might object, but the decision had already been made. Before they crossed into Russian Poland they would stop. Shadowmane needed water and rest, his wounds needed cleaning again, and his men were little better. Soldiers who had fought since before dawn now needed food, ammunition and time to breathe; trucks needed fuel, machine guns required fresh barrels and the Panzers could not continue indefinitely on momentum alone.
They had broken the Russians at Soldau. There was no sense destroying themselves in the pursuit.
Oskar looked south through the blood-stained sockets of his skull helm. Somewhere beyond the haze and fleeing columns waited the frontier.
What came after that, he had not yet entirely decided, so for the moment he was improvising.
Elsewhere, men with maps were beginning to decide for him.
At Black Legion headquarters in Königsberg, the battle across East Prussia was unfolding almost unbelievably well.
The Russian First and Second Armies had struck the defensive system from east and south with enormous weight, yet by late afternoon their momentum was already dying. The Black Legion's line had bent in places, and a handful of exposed checkerboard positions had been abandoned, but nothing important had broken. Those small detachments had withdrawn exactly as planned, leaving advancing Russians to stumble into minefields, overlapping machine-gun fire and secondary positions waiting behind them. In several sectors, ground lost during the morning was already being retaken.
The air war had been even more one-sided. German fighters were increasingly driving Russian reconnaissance machines from the sky, while bombers attacked artillery concentrations, wagon columns and formations careless enough to gather in the open. Along the southern front, tanks and armoured vehicles were proving especially effective, moving between threatened sectors faster than Russian commanders could react and striking penetrations before they could be widened.
It was as though two Russian armies had thrown themselves against an enormous wall.
The wall had cracked in places.
It had not broken.
The atmosphere around the operations table therefore carried a dangerous trace of celebration, restrained only by the knowledge that Russia still possessed vastly more men than the Black Legion could hope to match.
Hindenburg stood over the map with his usual calm, broad hands planted against its edge while officers moved markers according to the latest reports. Ludendorff was considerably less restrained. He moved from one side of the table to the other, reading messages, asking for ammunition figures and studying roads south and east of the frontier with an enthusiasm that made Hindenburg increasingly suspicious.
"You are already invading Russia in your head," Hindenburg observed.
Ludendorff did not look up. "Someone ought to."
"We have been fighting for less than a day."
"And the Russians have already stopped advancing."
"They have slowed."
"They have stopped."
Hindenburg gave him a sideways glance. "This is why I insist upon standing near you whenever maps are present."
Ludendorff finally looked up. "Because I improve them?"
"Because otherwise you begin conquering countries we do not yet occupy."
A few staff officers smiled.
Ludendorff merely returned his attention to the map. "His Highness has spent years preparing us to do precisely this if the opportunity appeared."
"The opportunity has not yet appeared."
"It is beginning to."
Hindenburg could not entirely disagree. Oskar's predictions had been disturbingly accurate. The Russians had come where he said they would come, in roughly the manner he had expected. Their numerical superiority remained enormous, but the Black Legion's prepared positions, communications and firepower were making that superiority increasingly difficult to use.
Their problem was not winning local engagements.
It was what came afterward.
The Black Legion was barely large enough to cover the decisive approaches into East Prussia. Launching a major offensive into an empire the size of Russia with the same army was another matter entirely.
Then a staff officer hurried into the room carrying a fresh wireless report.
He reached the table and stopped, and for once he seemed unsure how to begin.
Hindenburg looked at him.
"Well?"
The officer swallowed.
"Generals... the latest report from Soldau."
"We know Soldau held," Ludendorff said impatiently.
"Yes, General. It did."
The officer hesitated again.
Hindenburg's eyebrows rose. "Out with it."
"His Highness is no longer at Soldau."
Ludendorff stopped moving.
The officer continued. "He is leading the pursuit personally. The Russians on that sector are retreating toward the frontier, and the Panzers, motorcycles and motorised troops are following him south. They are advancing toward Russian Poland as we speak."
For several seconds nobody around the table spoke.
Ludendorff slowly raised an eyebrow.
"Really?"
Hindenburg stared at the map.
"How far?"
"Several kilometres beyond the original defensive positions already, General."
"And François?"
"Most of the corps remains on the prepared line. Only the Soldau sector and formations immediately supporting it are moving forward."
That made the situation clearer.
This was not a general offensive.
It was a narrow rupture at the extreme flank, driven forward by Oskar before anyone at headquarters had ordered it.
Ludendorff's astonishment lasted perhaps three seconds.
Then his expression began to brighten.
Hindenburg noticed.
"No."
"I have said nothing."
"You are about to."
The officer was still standing there.
"There is another directive from His Highness," he said.
Both men looked toward him.
The staff officer glanced at the paper.
"No prisoners."
The room changed.
Ludendorff's smile disappeared.
Hindenburg held out his hand, and the officer gave him the message.
There was little more upon it.
No request for reinforcements.
No order to launch a general counteroffensive.
No instruction to hold the present line.
Only the report of Oskar's advance and the directive concerning prisoners.
Ludendorff impatiently took the paper from Hindenburg and read it himself.
"That's all?"
"Yes, General."
"No follow-up?"
"No."
Ludendorff frowned. "What in God's name is he thinking?"
Hindenburg remained silent.
Then his expression changed.
"I know what he is thinking."
Ludendorff looked at him.
Hindenburg tapped the blank space beneath the message.
"He has made his move. He is leaving the rest to us."
A small silence followed.
The thought made perfect sense. Oskar had after all spent years insisting that he did not want an army of officers waiting for permission to think. He had created the conditions at Soldau, broken the Russian flank and begun exploiting it himself.
Now he had deliberately given no order telling Königsberg what to do.
Ludendorff smiled again.
"Then we attack."
Hindenburg looked toward the second line of the report.
"First we discuss this."
Ludendorff followed his gaze.
No prisoners.
The older general's expression hardened.
"We spoke of it before the war," he said. "As a logistical possibility. That is quite different from actually issuing the order."
"It remains the same arithmetic."
"It is not merely arithmetic, Erich. There are laws governing war. There are consequences when an army announces that surrender offers no protection."
Ludendorff folded his arms.
"And there are consequences when an army of one hundred and eighty thousand men begins collecting tens of thousands of prisoners while attempting to advance into Russia."
"I understand the argument."
"Then what concerns you?"
"What it makes us."
That stopped Ludendorff for a moment.
Hindenburg continued. "And what it invites in return. If Russians discover that our men give no quarter, why should they take German prisoners?"
Ludendorff gave him a thin smile.
"Then we should endeavour not to be captured."
Hindenburg stared at him.
"That," he said slowly, "is exactly the sort of answer I feared from you."
"Look at the reports, Paul. Where have they captured us? A few isolated positions have withdrawn exactly as planned. Their attacks are breaking against mines and machine guns. Their artillery is being hunted from the air. Soldau has collapsed so completely that His Highness is riding toward Poland before sunset."
"That does not make our soldiers immortal."
"No. It makes the risk acceptable."
Hindenburg's jaw tightened.
Ludendorff stepped closer to the table. "Besides, His Highness does not regard this as some ordinary quarrel over borders or provinces. Serbia was condemned for supporting terror. Russia chose to stand behind Serbia and then declared war upon us. In his eyes, that decision placed Russia on the same side of the line."
Hindenburg's expression remained hard. "That distinction will not impress every foreign ministry in Europe."
"Foreign ministries do not command this army."
"Neither does His Highness command the Empire."
Ludendorff looked at him.
There it was.
Hindenburg chose his next words carefully. "He is Crown Prince and commander of the Black Legion, yes. But he is not Kaiser. Moltke remains Chief of the General Staff. Orders like this do not end at the boundaries of East Prussia. They carry consequences for the entire Empire."
A faint smile touched Ludendorff's mouth.
"Come now, Paul."
Hindenburg's eyes narrowed.
"You know as well as I do where the real power in this army—and increasingly in this Empire—actually lies."
"Careful, Erich."
"Have I wounded your constitutional sensibilities?"
"You are beginning to sound treasonous."
Ludendorff's smile widened slightly. "And you are beginning to sound as though you are considering disobeying His Highness."
Hindenburg straightened immediately.
"No."
The answer came hard enough to silence several nearby officers.
"My loyalty is not in question. Not to the Empire, not to the Imperial House, and certainly not to His Highness. Do not mistake caution for disobedience."
Ludendorff's expression softened.
"I know."
"What concerns me is what his words become once repeated by hundreds of thousands of men. 'No prisoners' is very easy to understand and very difficult to control afterward."
Hindenburg looked down at the message again.
"So we obey the decision."
Ludendorff nodded.
"But not necessarily the wording."
That earned him a curious glance.
Hindenburg folded the paper once. "The order remains within the army. Reports concerning prisoners do not travel west without passing through censorship, and the directive issued to the formations will be framed more carefully. Russia entered this conflict in support of a state His Highness has already condemned for sponsoring terror. Russian forces operating on German soil may therefore be treated accordingly. Surrender from broken formations cannot automatically be assumed genuine while fighting continues. Concealed weapons, feigned surrender and renewed resistance are all to be considered possible."
Ludendorff understood immediately.
"Meaning?"
"Meaning our soldiers are under no obligation to endanger themselves attempting to take such men prisoner. Hostile Russian formations remain weapons-free. If an enemy throws down his rifle only after the position around him has collapsed, no Black Legionary will be court-martialled because he chose to fire rather than trust the gesture."
A faint smile appeared on Ludendorff's face.
"Very diplomatic."
"It is still His Highness's order," Hindenburg replied. "Only expressed in language less likely to set every foreign ministry in Europe on fire before sunset."
"It will do."
Hindenburg pointed a finger at him.
"You deal with the Russians. I shall deal with the wording."
"Gladly."
It was hardly a resolution to the moral question, but it was as close to one as headquarters was likely to find that day.
Ludendorff was already looking back toward Soldau.
"Now we attack."
"Cautiously."
"We have them off balance."
"We have one flank off balance."
"Which is precisely why we should hit it before it regains balance."
Hindenburg studied the map for several moments.
"The First Army is still pressing in the east."
"Its momentum is dying."
"Not dead."
Ludendorff exhaled impatiently.
Hindenburg moved one marker south of Soldau.
"We reinforce His Highness. The neighbouring formations widen the breach, and the armour continues wherever supply allows. But the rest of the line holds."
Ludendorff listened.
"When the First Army's offensive finally exhausts itself," Hindenburg continued, "we shift the main air strength south."
Now Ludendorff smiled.
"Armour and aircraft together."
"Exactly what His Highness has spent years preaching."
"The blitzkrieg."
Hindenburg looked at him.
"I still dislike that word."
"You will learn."
"I sincerely hope not."
Ludendorff traced a rough curve around the Russian Second Army.
"So we hold First Army where it is. We widen Soldau carefully. Then, once the aircraft come south, we strike into the Second Army's rear and cut the roads toward Warsaw."
"We try," Hindenburg corrected. "We are still badly outnumbered."
Ludendorff's eyes remained on the map.
"Not everywhere that matters."
That earned him a brief silence.
Then Hindenburg nodded.
"No general offensive tonight. Support Oskar. Widen the rupture. Let the men rest where necessary and let supply catch up. Once the eastern Russian attack is spent, we move the aircraft south and decide how much of Second Army can be trapped."
Ludendorff looked almost disappointed by the restraint.
Almost.
"Agreed."
For the moment, that was enough.
The detailed plan would come later.
Hindenburg looked toward the operations officers.
"Send the preliminary orders."
Around them the headquarters came alive.
The Russian First Army would remain fixed against the eastern defences.
The Soldau breakthrough would be supported and widened, but not allowed to drag the entire Black Legion recklessly across the frontier.
And once the Russian offensive in the east had finally exhausted itself, German aircraft would turn south to join the Panzers and motorised formations already gathering behind Oskar.
Then the Black Legion would find out whether a narrow victory at Soldau could become something far greater.
Whether the Russian Second Army could be prevented from escaping toward Warsaw at all.