Sun Tzu

Sun Tzu was an influential Chinese philosopher and military strategist, most famous for writing The Art of War. The Doctor claimed to have met Sun Tzu twice, once with Ace. (PROSE: The Shadow of Weng-Chiang, AUDIO: 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. (PROSE: Set Piece)