 At the Chanh Tay gate () on the west wall of the Citadel, a six-man PAVN sapper team dressed in ARVN uniforms killed the guards and opened the gate.Upon their flashlight signals, the 800th Battalion and several teams from the 12th Sapper Battalion rushed through the gate and headed northwest towards Tây Lộc Airfield.A 40-man assault team that was tasked with attacking Mang Ca through a sewer found the entrance blocked and moved around to assault the Huu Gate () at the southwest corner of the Citadel; they were engaged by an ARVN machine gun and lost 24 men before seizing their objective.