The relieving force sent to help the Mai Loc overrun was Troops A, B, and C of the 3/5 Cav Squadron stationed at Dong Ha.
Mai Loc Camp (also known as Firebase Mai Loc and Firebase Victory) was a U.S. Army and Army of the Republic of Vietnam (ARVN) base located west of Quảng Trị in central Vietnam.
[2] The 3rd Brigade, 101st Airborne Division comprising: supported by 2nd Battalion, 319th Artillery was based here in October–November 1969.
At 02:35 on 10 April the camp was hit by 75-100 82mm mortar and Rocket-propelled grenade rounds followed by a sapper attack.
At 03:40 a unit from the 1st Brigade, 5th Infantry Division (Mechanized) reinforced the camp and helicopter gunships and a Republic of Vietnam Air Force (RVNAF) AC-47 Spooky gunship provided fire support.