Bands of Christian samurai support Ieyasu's enemies at the Battle of Osaka.

The Sanada-maru is an earthwork barbican defended by Sanada Yukimura and seven thousand men, on behalf of the Toyotomi.

The Shogun's armies are repeatedly repelled, and Sanada and his men launch a number of attacks against the siege lines, breaking through three times.

Ieyasu then resorts to artillery, which include seventeen imported European cannons and domestic wrought iron cannon, as well as men to dig under the walls.

The Winter Siege is ended on January 22, with Toyotomi Hideyori pledging to not rise in rebellion, and agreeing to allow the destruction of the castle’s outer moat, but Ieyasu’s envoys instead destroy both the outer and inner moats, leaving the castle defenseless.