Variation in Tactics/The Nine Variations focuses on the need for flexibility in an army's responses. It explains how to respond to shifting circumstances successfully.
Learning highlight : <<故将通于九变之利者，知用兵矣>> ~ The general who knows how to vary and adapt to changing situations so as to gain advantages is one who is skilful in applying the art of war.
Cache is attached to a non-living thing.
Bonus' data to collect : what is the third red number on the nearby (across the toad) red structure commencing with WD ? Take it down as C8.
Bonus cache : GC49EWV (The Art of War Bonus - Right Flank).