Over the following centuries the power of the emperor and the imperial court gradually declined and passed to the military clans and their armies of samurai warriors. The Minamoto clan under Minamoto no Yoritomo emerged victorious from the Genpei War of 1180–85. After seizing power, Yoritomo set up his capital in Kamakura and took the title of shogun. In 1274 and 1281, the Kamakura shogunate withstood two Mongol invasions, but in 1333 it was toppled by a rival claimant to the shogunate, ushering in the Muromachi period. During the Muromachi period regional warlords known as daimyō grew in power at the expense of the shogun. Eventually, Japan descended into a period of civil war. Over the course of the late sixteenth century, Japan was reunified
