 The 4th Battalion, 3rd Regiment, south of the river, crossed the river and assaulted the Thuong Tu Gate near the eastern corner of the Citadel.When seven successive attempts to breach the gate failed, the battalion joined the 2nd and 3rd Battalions, 3rd Regiment, near the southern corner of the Citadel.On 6 February, the 1st Battalion captured the An Hoa Gate on the northwest corner of the Citadel and the 4th Battalion captured the southwest wall.