The Race for Position
The conflict with the state of Ch'u has reached a critical juncture. Your scouts report that General Bao is marching his massive army toward the Jade River Valley. It is a strategic choke point; whoever controls it controls the flow of supplies for the entire region.
Sun Tzu's teachings echo in your mind: "Whoever is first in the field and awaits the coming of the enemy, will be fresh for the fight; whoever is second in the field and has to hasten to battle, will arrive exhausted."
Your troops are currently encamped twenty li away. You could march immediately through the night to seize the valley before Bao arrives, or you could let Bao take the valley and set up a defensive perimeter while you conserve your energy here.
The choice is yours, General.