会津戦争
In 1868–1869, Yamakawa's family was on the losing side of the Boshin War. The Boshin War was a civil war at the end of Japan's "bakumatsu" ("end of military government"), in which pro-shogunate forces resisted the new imperial rule that began with the 1867 Meiji Restoration. The conflict reached Yamakawa's hometown with the Battle of Aizu in late 1868. On October 8, 1868, when Yamakawa was eight, imperial forces invaded and burned her hometown of Wakamatsu. Yamakawa took shelter within the walls of Tsuruga Castle with her mother and sisters. Several hundred people from other samurai families instead committed ritual suicide, in what would become a famous instance of mass suicide. This invasion marked the beginning of a monthlong siege, which came to be a symbol of "heroic and desperate resistance." It was during the Battle of Aizu that the Byakkotai (White Tiger Brigade), a group of teenage fighters, famously committed mass suicide under the mistaken belief that the castle had fallen.