Mitsunari, knowing that Ieyasu is heading toward…

Mitsunari, knowing that Ieyasu is heading toward Osaka, decides to abandon his positions and march to Sekigahara.

On September 15, 1600, the two sides start to deploy their forces.

Ieyasu's eastern army has eighty eight thousand eight hundred and eighty-eight men, whilst Mitsunari's western army numbers eighty-one thousand eight hundred and ninety.

There are about twenty thousand arquebusiers and other forms of hand-held gunners deployed in the battlefield, corresponding to over ten percent of all troops present.