In June 1600, Tadaoki led his forces to join Ieyasu's Campaign in Aizu against Kagekatsu UESUGI, leaving Yusai with less than 500 men to protect Tango Tanabe Castle.
慶長5年（1600年）6月、忠興が家康の会津（上杉景勝）征伐に軍勢を引きつれて参加し、幽斎は500に満たない手勢で丹後田辺城(丹後国)を守る。