Task: Text Categorization
Input (English): This period was followed by the Nanboku-cho era, which included the Siege of Kuromaru. One achievement of this event was the creation of the Musha-Dokoro guard station. This era is recounted in the historical epic Taiheiki. One battle during this event saw an army at the Chihaya Fortress led by Nitta Yoshisada make a low tide attack against a fortified government base. With the help of Buddhist monks from the Kinai area, this event saw Prince Morinaga take the title of regent. One figure in this event, who was exiled to Oki Island, took advantage of the end of the insei system of cloistered rule to seize full power. For ten points, name this movement led by Emperor Go-Daigo that destroyed the first bakufu, preceded the Muromachi shogunate of Ashikaga Takauji, overthrew the Kamakura Shogunate, and briefly restored imperial rule to Japan.
Output (English): History