Region: Korean Peninsula · Coordinates: 35.210, 128.570 · 7 events
| Year | Source | Account |
|---|---|---|
| AD 1272 | Goryeosa (History of Goryeo) | The Samyeolcho raid Happ'o, burn twenty warships, and take four Mongol garrison soldiers captive. |
| AD 1273 | Goryeosa (History of Goryeo) | The Samyeolcho again raid Happ'o, burn thirty-two warships, and kill or capture more than ten Mongol soldiers. |
| AD 1274 | Goryeosa Jeolyo (Essentials of Goryeo History) | October 1274: Governor-General Kim Bang-gyeong and others set out from Happo to attack Japan with 8,000 Goryeo troops, 25,000 Mongol-Han troops and over 900 warships |
| AD 1281 | Goryeosa Jeolyo (Essentials of Goryeo History) | May 1281: Hindu, Hong Da-gu, Kim Bang-gyeong, Bak Gu, Kim Ju-jeong and others set out by sea to attack Japan |
| AD 1282 | Goryeosa (History of Goryeo) | When the Dongjeong army is defeated, three hundred forty soldiers are sent to guard Happ'o and sixty to guard the royal capital. |
| AD 1350 | Goryeosa (History of Goryeo) | Twenty Japanese ships raid Happ'o, and burn its office and the several districts of Goseong and Hoewon. |
| AD 1374 | Goryeosa Jeolyo (Essentials of Goryeo History) | 1374: 350 Japanese ships invade Happo, burning the camp and warships and killing over 50 soldiers. Military commissioner Kim Hoeng is executed |