According to "Jingugi" (Chronicle of Empress Jingu), he defeated the army of Shikuma no mikoto, who tried to prevent the Empress from entering the Kinai region (provinces surrounding Kyoto and Nara), when she was on the way back from the Sankan seibatsu (the conquest of three countries in ancient Korea).
「神功紀」によると、三韓征伐より帰還した皇后の畿内入りを阻止しようとした忍熊王の軍を破った。