How did summer save japan twice?

Answer 1

1. The Mongol invasions of Japan of 1274 and 1281 were major military efforts undertaken by Kublai Khan to conquer the Japanese islands after the submission of Goryep (Korea) to vassaldom. Despite their ultimate failure, the invasion attempts are of macrohistorical importance, because they set a limit on Mongol expansion, and rank as nation-defining events in Japanese history. The Japanese were successful, in part because the Mongols lost up to 75% of their troops and supplies both times on the ocean as a result of major storms. ( tropical storm mostly come insummer ) (this did not happen in WW2 )