Sun Tzu

Sun Tzu (544-496 BC) was an influential Chinese philosopher and military strategist. The Doctor claimed to have met Sun Tzu twice, once with Ace. (MA: The Shadow of Weng-Chiang and BFA: The Shadow of the Scourge)

The Doctor replaced Sun Tzu as the Chinese Emperor's military advisor, but held conflict resolution seminars instead of fighting. (NA: Set Piece)