5 events the sources record for this year, grouped by region.
What happened
China (1)
The Manho Yi Seong and Bugu Han Bang-do of the Seohae Route die fighting the Japanese at Mongmi Island. (Goryeosa (History of Goryeo) 世家 卷44 恭愍 二十三年)
Korean Peninsula (4)
The Japanese raid Anju, and the magistrate Park Su-gyeong fights hard and drives them off. (Goryeosa (History of Goryeo) 世家 卷44 恭愍 二十三年)
The Japanese raid Yangju, and our army fights and cuts off more than a hundred heads. (Goryeosa (History of Goryeo) 世家 卷44 恭愍 二十三年)
Choe Yeong leads the various armies to Tamna, defeats the enemy, and cuts off three leaders, sending their heads to the capital; Tamna is pacified. (Goryeosa (History of Goryeo) 世家 卷44 恭愍 二十三年)
1374: 350 Japanese ships invade Happo, burning the camp and warships and killing over 50 soldiers. Military commissioner Kim Hoeng is executed (Goryeosa Jeolyo (Essentials of Goryeo History) 권29 恭愍王 二十三年)