Ōuetsu Reppan Dōmei
In the Bakumatsu period, Matsudaira Tadachika became an influential official in the Tokugawa administration. However, the final "daimyō" of Shimabara, Matsudaira Tadakazu pledged Shimabara domain in support of Emperor Meiji in the Boshin War, proved his loyalty by committing his troops to the northern campaign against the Ōuetsu Reppan Dōmei, fighting at Akita and Morioka.