Speed is the essence of war?

Langya Pass.
Wu Lie has led his troops to join the defenders at Langya Pass.
However, they were only taking a temporary break, pretending to be ready to storm Langya Pass at any time.
Another group of people had been sent by him to collect dry food from the tribes around the horse-grazing grassland.
This time they were going to raid with light equipment and could not carry too much food and fodder.
Human rations are secondary, the main thing is to ensure food for war horses.
Fortunately,...