Energy/Directing explains the use of creativity and timing in building an army's momentum.
Learning highlight :<<凡战者，以正合，以奇胜>> ~ In battle, use the direct force to engage the enemy, and the indirect force to win.
Cache is on the rear.
Bonus' data to collect : what is the red number on the structure ? Take it down as C5 (take a single digit from both identical numbers).
Bonus cache : GC49EWB (The Art of War Bonus - Left Flank).