The Iwami Rebellion occurred from June to October 1867 during the Boshin War, when a peasant rebellion affiliated with the pro-Shogunate Tsuwano Domain broke out in the pro-Imperial, Choshu-ruled Iwami Province. The Nagaoka Domain's persistent bombardment of Iwami Province devastated the countryside and alienated the population from their Choshu rulers, who failed to deal with the Shogunate fleets' attacks on their coastline. Kiso Yoshisato rallied the population against the Choshu Domain, playing on their war weariness and their resistance to the domain's modernization, and he and his followers devastated the countryside to deprive the Choshu Domain of much-needed tax income. In October 1867, Yoshisato launched a failed attack on the provincial capital of Hamada, only for his army to be destroyed by Hamada's sizable garrison. Yoshisato and all of his men were killed, and public order was restored to Iwami.