Sawayama Castle, which was a residence of Mitsunari, fell under attack by the eastern army on September 18, and Mitsunari's father Masatsugu and most of the Ishida family died in the battle.
一方、9月18日に東軍の攻撃を受けて三成の居城・佐和山城は落城し、三成の父・正継をはじめとする石田一族の多くは討死した。