Should the enemy strengthen his van, he will weaken his rear; should he strengthen his rear, he will weaken his van; should he strengthen his left, he will weaken his right; should he strengthen his right, he will weaken his left. If he sends reinforcements everywhere, he will everywhere be weak.
Sun Tzu, Julius Caesar, Einhard, Niccolò Machiavelli, Carl von Clausewitz (2016). “Strategy Six Pack”, p.16, Lulu.com
