 Yamagata Domain

Much of Dewa Province was controlled by the powerful Mogami clan during the Sengoku period.After Toyotomi Hideyoshi assigned the Uesugi clan to Aizu, senior Uesugi retainer Naoe Kanetsugu established himself at the neighboring Yonezawa Domain, with an army of 20,000 and gradually expanded his control north into Mogami territory.