The Mongol Empire attempted to invade Japan in 1274 and 1281, both during the Kamakura Period (1185-1333). It is believed that about 4,400 ships came to the area in the second invasion attempt.

KYOTO--An iron helmet believed worn by a Mongol warrior during a 13th-century invasion of Japan has turned up at a shrine here, which prayed for the nation’s victory. The cone-shaped headgear ...