The , also known as the Second Battle of Hakata Bay, was the second attempt by the Yuan Dynasty founded by the Mongols to invade Japan; they had failed seven years earlier, in the Battle of Bun'ei. In the summer of 1281 they gathered two invasion forces and invaded. After inconclusive fighting the invasion fleet was destroyed by a storm and the Yuan withdrew; the Japanese called the storm which chased away their invaders kamikaze ("divine wind"), a prestigious name later used in the Second World War for aerial suicide attacks.