Battle of Aizu
During the Boshin War, the domain supported the imperial side, and participated in the Battle of Kōshū-Katsunuma, Battle of Hokuetsu and Battle of Aizu. In July 1871, with the abolition of the han system, Suwa Domain briefly became Takashima Prefecture, and was merged into the newly created Nagano Prefecture. Under the new Meiji government, Suwa Tadamasa, the next-to-last "daimyō" of Suwa Domain was given the "kazoku" peerage title of "shishaku" (viscount).