Warfare is not that simple; except for the rapid assault of light troops who can move at once, the mobilization of a large army requires preparation in advance.
Logistics and battle readiness need to be coordinated.
When two armies are at a standoff, it is impossible for hundreds of thousands of troops to just stand there idly day after day, staring at each other with necks craned. You must understand, they consume an enormous amount of provisions every day.
Therefore, Zhao Hanzhang would disperse the army across various locations to alleviate pressure, ensuring that when a battle starts, reinforcements could come quickly and unite swiftly into one army.
Shi Le did the same.
So when he suddenly withdrew his forces, even with the original provisions supporting them, he was still somewhat distressed because the army transporting the provisions was halfway, and they could not change course quickly to pursue them.
