Excerpts from Books and Wikipedia
"In 1264, Kublai Khan took Beijing to seize control of northern China and battled the remains of the Sung dynasty in the south. The Sung's ally, the Emperor of Japan, HijoTokimune, was Kublai Khan's next target. . . . But the force returned to its boats, which were dispersed in a sudden storm--perhaps 200 ships and 15,000 men were lost in a single night. . . . The following night [seven years later] a violent typhoon sank 4,000 Mongol ships and drowned an estimated 100,000 men. . . . The second defeat ended the Mongol aspirations of expansion, and was celebrated in Japan as being the results of a kami kaze ('divine wind')." [1001 Days]