Kobayakawa Hideaki
In mid 1600, the campaign begin, Mitsunari's besieged Fushimi Castle before marching into direct conflict with Tokugawa's alliance at Sekigahara. In October 21, at the main Battle of Sekigahara number of lords stayed neutral, watching the battle from afar, not wishing to join in the losing side. Tokugawa's forces gained the edge in the battle, especially with the betrayal of Kobayakawa Hideaki to his side, and won the battle.