 Mitsunari's support largely came from the south and west of Japan, with the addition of the Uesugi clan in the north, while Tokugawa's support came from central and northern Japan, but had influence and intimidation over some of the Western lords.The titular head of the Western alliance was Mōri Terumoto, but Mōri stayed entrenched in his castle; leadership fell to Mitsunari in the field.In 1600, he besieged Fushimi Castle before marching into direct conflict with Tokugawa's alliance at Battle of Sekigahara.