Sōma clan
Date Masamune was born as Bontemaru (梵天丸) later Tojiro (藤次郎) the eldest son of Date Terumune, born in Yonezawa Castle (in modern Yamagata Prefecture). At the age of 14 in 1581, Masamune led his first campaign, helping his father fight the Sōma clan. In 1584, at the age of 17, Masamune succeeded his father, Terumune, who chose to retire from his position as "daimyō". Masamune's army was recognized by its black armor and golden headgear.