Aizu-Wakamatsu was once the capital of the Aizu clan, whose reign came to an end in the Bōshin civil war of 1868, when the clan sided with the Tokugawa shogunate against the imperial faction. The fall of Aizu is famous throughout Japan on account of the Byakkotai (White Tigers). This group of teenage samurai committed seppuku (ritual suicide by disembowelment) when they saw Tsuruga-jō castle shrouded in smoke. In reality it was the surrounding area that was ablaze and it took weeks before defeat was final, but the White Tigers emerged as a powerful symbol of loyalty and fraternity. Their story is commemorated at Iimori-yama, the mountain where they met their end.