KYOTO--An iron helmet believed worn by a Mongol warrior during a 13th-century invasion of ... to records. In 1281, respects were paid at the shrine to pray for Japan’s triumph at the order ...

This refers to the military forces of Genko, two military campaigns launched against Japan by the Mongol Empire (Yuan Dynasty) and its vassal state, Goguryeo, in the years 1274 and 1281.