By 11 February FSB A Luoi had become the central fire base and command center for the operation with six 105mm howitzers and six 155mm howitzers. On the afternoon of 11 February the Airborne and armored units patrolling north of FSB A Luoi engaged a PAVN unit losing two M113 armored personnel carriers destroyed and one killed. That same afternoon the 3/1 Battalion, 1st Infantry Division was landed at LZ Don (), at 16:15 they investigated an area 1km south of LZ Don which had been hit by airstrikes and found 23 PAVN dead, two 12.7mm machine guns, four AK-47s and a radio. At 18:25 the 21st Ranger Battalion engaged the PAVN 4km northeast of Ranger South killing 11 PAVN. On the evening of 11 February Forward Support Area 26-1 at Vandegrift Combat Base was hit by six 122mm rockets killing four U.S. troops.