When troops of Oda and Tokugawa defeated the troops of Takeda in the Battle of Nagashino in 1575 thanks to the power of guns, the troops of Tokugawa obtained Totomi and Suruga, which were territories of Takeda, in 1582.
1575年長篠の戦いに織田、徳川軍が鉄砲の力を利用して武田軍を破ると1582年徳川軍は武田領の遠江、駿河を得た。