 The sappers’ mission was to scale the Citadel’s wall near the Mang Ca compound, open and hold the Hau and An Hoa Gates and assist the infantry company with its attack on Trưởng's headquarters.The PAVN-VC could not afford to engage in a firefight at this point, and they succeeded in sneaking away without raising further alarms.After a few minutes, the RF soldiers stopped shooting, and some began to wonder whether they had seen enemy troops or had been firing at shadows.