Year 1331 (MCCCXXXI) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. Events of 1331 September 8 – Stefan Dusan declares himself king of Serbia. September 24 – Edward Balliol's enthroned as King of Scotland. September 27 – Battle of Płowce: The German Teutonic Knights and the Poles battle to a draw. Ibn Battuta visits Kilwa. The Genkō War begins in Japan. Births February 16 – Coluccio Salutati, Florentin… (More on 1331)