The signal reached Batu near midmorning on the second day.
Three flashes from the rear observation pair. A pause. Then the formation signal.
Batu turned his horse immediately and cantered back through the column, counting the message as he rode. Pursuit from the northwest. Column formation. Organized movement, not scattered riders. By the time he reached Chaidu at the rear of the main force, the third sequence of flashes had resolved fully.
"Eight minutes from the first flash," Chaidu said.
His attention stayed fixed on the northwest horizon.
"Formation confirmation came three minutes later."
"Numbers?"
Chaidu narrowed his eyes slightly.
"Still reading."
The steppe stretched flat in every direction. Pale grass rolled under a low gray sky, and there was still nothing visible. The rise they had crossed earlier that morning lay somewhere behind them now, a dark scar against the horizon. Beyond it, two signal men were counting riders through reflected light and distance.
Another flash came.
The signal officer read it quickly. "Eight hundred. Possibly more. Moving fast."
Batu measured the situation without changing expression.
Eight hundred riders pushing hard against a column spread over more than a mile. Five hundred Jochid riders total. One hundred penalty horses tied through the rear ranks, each one slowing the men attached to them. The extra animals had already reduced the rear's pace by nearly a third. There were six hours of open steppe between them and any ground worth defending. No hills. No river crossings. Nothing that would slow a cavalry charge.
If the pursuing force kept its speed, it would reach them before the land changed.
"Cut the penalty horses loose," Batu said.
Chaidu finally looked at him.
"All of them. Immediately. Four riders drive them northeast and rejoin if they can. Everyone else tightens behind the main column."
Batu turned his horse again.
"Send a rider to Torghul. Tell him we're making for the Sarat ridge. I want the entire column at a canter within five minutes."
Chaidu was already issuing orders before Batu finished speaking.
Altu POV
Altu received the command while his tethered horse was still fighting the rein.
The Tergesh bay tied behind him had been pulling since the first hour of the march. The leather had worn grooves into Altu's palm from the constant strain. He drew his short blade and cut the tether near the fitting.
For one breath the bay stood motionless, confused by the sudden lack of pressure.
Then it saw the other horses breaking free.
Instinct took over.
The bay lunged east and slammed into the column's left flank, two hundred kilos of frightened horse forcing through the riders.
The man beside Altu jerked hard on his reins. His mount twisted sideways, legs crossing awkwardly as it nearly stumbled.
The bay burst through the gap and kept running until distance swallowed it into the grass.
The same chaos spread down the rear in different forms.
One grey penalty horse panicked the instant its tether snapped. It crashed into the nearest mount, forcing both animals sideways before breaking west at a dead run, head high and nostrils wide.
A compact roan bolted northeast for nearly two hundred meters before herd instinct pulled it back toward the column. It slowed into a nervous trot until one of the assigned riders intercepted it and drove it northeast again.
Three positions left of Altu, another rider reacted a moment too slowly. His penalty horse surged north while the rein was still half attached. The loose leather snapped across the rider's forearm hard enough to leave a welt through the sleeve.
He managed to keep his seat.
The horse vanished across the grass, dragging the severed tether behind it.
Four riders peeled away from the column to gather the released animals.
Their shouts disappeared into the wind.
Behind them, the rear ranks compressed inward and pushed themselves into a canter.
Batu POV
Batu rode the length of the column and watched the horses carefully.
Animals told the truth faster than men did.
They were two days out from the Tergesh camp. The canter was possible, but only barely. He could see the strain in the riders leaning forward, encouraging mounts that already wanted to settle into a slower gait.
Sweat darkened the horses' necks. Their mouths worked against the bits more heavily than they had that morning. They still had speed. The question was how long they could maintain it.
He reached Torghul near the front. Torghul already had the column accelerating before Chaidu's messenger finished speaking.
"The Sarat ridges," Batu said. "How far?"
"Two hours at a canter." Torghul glanced north. Tight lines formed at the corners of his eyes. "Less if the ground stays firm. The northwest face has a broken slope. Loose stone on the lower third."
"They'd use that side if they try to come around us from the north."
"Yes."
"Good."
Batu looked back over the tightened column. Without the penalty horses, the formation already looked cleaner.
"Send Jaran to me."
Torghul raised an eyebrow but signaled the rider anyway.
Jaran POV
Jaran arrived from the rear at a gallop and matched Batu's pace immediately. In the weeks since the Tergesh submission, he had learned to read Batu's expression before words were spoken.
"The Sarat ridges," Batu said. "Eastern side. Behind the second ridge."
"Basin," Jaran answered instantly.
No hesitation. He knew the terrain. He had moved winter herds through those hills since childhood.
"Between the first and second ridges on the eastern face," Jaran continued. "Maybe three hundred meters wide. You can't see it from the flats until you're already on the crest."
"How deep?"
Jaran considered it carefully. He remembered the heavy grass in the sheltered ground and the way sound disappeared there.
"A man could lie flat in it and stay hidden from twenty paces away."
Batu exchanged a look with Torghul. Torghul understood immediately.
"Ride back to Chaidu," Batu ordered. "If the pursuit closes within a mile before we reach the ridges, I want word at once."
Jaran wheeled his horse and left.
Torghul POV
The pursuit gained ground faster than Torghul expected.
Forty minutes into the canter, Chaidu's rear observers signaled again. The distance was collapsing. The enemy force was driving its horses beyond sustainable pace, which meant this had been planned as a short pursuit. They expected to catch the column before terrain complicated the chase.
They nearly succeeded.
The first Sarat ridge appeared fifty minutes later, dark and uneven against the flat horizon. After hours of open steppe, the rise felt almost abrupt. Batu ordered the column down to a trot.
"How much lead?" he asked.
Chaidu's signal officer finished counting before answering.
"Last reading placed them ninety minutes back. Maybe less now."
"Take the column to the ridge," Batu said. "Jaran and I go ahead first."
They galloped forward and reached the crest within minutes. Torghul waited below with the main force.
When Batu rode back down, Torghul recognized the expression immediately. Batu had found usable ground.
Torghul climbed the ridge himself and studied the terrain.
The ridge stretched north to south for roughly half a mile before breaking into loose stone at the northern end. The eastern side dropped into a shallow basin hidden completely from the flats below. Behind it, the second ridge rose lower than the first but offered a clear view back across the area.
Batu explained the plan while Torghul tested each part against the ground.
Four hundred riders divided into three groups. One hundred and fifty visible along the ridge crest. Another hundred concealed inside the eastern basin. The remaining hundred and fifty split between the rocky northern ground and a smaller southern reserve.
Torghul followed the sequence carefully.
The visible line would hold until the pursuing charge committed halfway up the slope. Then the defenders would retreat back over the crest. The attackers, already disordered by the climb and their own speed, would pursue onto the ridge top expecting a collapse.
Instead they would find empty ground.
Then Chaidu's hidden riders would strike from the eastern basin while the crest line turned back from the west. The pursuing force would arrive at the top with broken formation, lost momentum, and attacks hitting from two sides at once.
"It only works if the crest line holds long enough," Torghul said. "Break early and the charge loses momentum before the top. Hold too long and we get trapped withdrawing over the ridge."
"That's the difficult part."
"I'll command the crest line myself."
He said it plainly. Batu accepted it without argument.
Then the revised signal arrived.
Torghul watched the signal officer's expression tighten before the man even spoke.
"Revised count. Nine hundred and forty. Possibly more."
Torghul fell silent and looked at Batu.
Nine hundred and forty riders changed the balance of the trap. A hundred hidden cavalry emerging from the basin depended on the enemy's full attention staying fixed on the ridge fight. With nearly a thousand riders, the pursuing force could detach troops without weakening the main assault. Even twenty riders sent eastward could intercept Chaidu before the hidden force reached the fight.
Batu was already recalculating. His gaze moved from the basin to the southern reserve.
"Change the numbers," he said. "Pull thirty from the south reserve and reinforce Chaidu."
"The south drops to twenty riders then."
"If their left flank reaches the southern end in strength, twenty men won't stop them anyway." Batu pointed toward the basin. "The trap closes there. Chaidu needs enough riders to break through when the moment comes."
"And if the south collapses?"
"Then we deal with a breach there. But if the basin fails, the entire plan fails."
Torghul nodded once and rode back toward the column.
Batu POV
Batu remained on the ridge crest and watched the flats below.
Riders moved into position across both sides of the ridge. He could hear muted movement carrying through the wind. Men entering the basin. Others spreading across the broken northern rocks. Horses snorting softly while formations settled into place.
His own mount stood still, ears angled northwest.
Then the ears shifted sharply.
The pursuing force appeared on the horizon.
At first it was only a dark line against pale grass. Then the mass thickened as it advanced. The riders were no longer maintaining formation. Ninety minutes of hard riding had stripped that away. What remained was momentum and intent. Hundreds of men driving forward in the same direction.
Batu counted the banners as they became visible.
Green on the left flank. The Ulus mark.
He had sent their outriders home two days earlier carrying a lesson. Apparently someone had convinced them the lesson no longer mattered.
Then he saw the dark red banner with the horizontal stripe through its center.
Batu studied it for several moments.
After his reincarnation, he had read every surviving record from Jochi's era that he could find. He had built his understanding of the western territories piece by piece. That banner appeared repeatedly in those records.
The Khotor branch of the Merkid line.
Driven west after Genghis destroyed their main force thirty years earlier.
A generation raised on loss did not forget easily. Men passed that hatred to their sons until memory hardened into certainty. Certainty like that could move armies.
On the right flank rode a smaller yellow banner belonging to one of the western minor clans.
The Ulus had not organized this alliance.
The Khotor had.
Someone under that central banner had reached the Ulus after Batu released their outriders and had found the exact argument needed to reverse their decision. That required leverage, influence, or both. None of those possibilities suggested a weak commander.
Batu fixed the banner in memory, then rode downslope toward his reserve position.
Below the ridge, nearly a thousand riders kept coming, led by men whose reasons for this battle had begun thirty years earlier.