He issued an order to conquer the eastern part of Japan and won the battle against the former bakufu forces which occurred between 1868 and 1869 (the Boshin War).
東征を命じ、旧幕府軍と　明治元年（1868年）から明治2年（1869年）にかけて戦い勝利した（戊辰戦争）。