sentences:  In the area of the ARVN 1st Regiment, the PAVN 18th Regiment, 325th Division, supported by the 98th Artillery Regiment, took Hill 350 and drove on to assault Nui Bong.Although the mountain changed hands three times that afternoon, the 2nd Battalion, 1st Infantry, controlled it on 22 March.Other formations of the 325th, notably the 101st Regiment, forced the 60th Ranger Battalion, 15th Group, from Hill 500 west of Phú Lộc, and supporting artillery interdicted Highway 1.