Nam Đông is situated 32 miles (51 km) west of Da Nang in a valley near the Laotian border; it was manned by South Vietnamese personnel with American and Australian advisers, and served as a major thorn in the side of local VC militants.
The PAVN/VC struck at the camp at 02:30 on 5 July to achieve the element of surprise, and reached the outer perimeter where CIDG forces managed to hold out. At 04:00 the senior officer, Captain Roger Donlon, radioed for support and 2 hours later 6 HMM-162 helicopters carrying reinforcements escorted by 2 U.S. Army UH-1B helicopter gunships left Da Nang Air Base for Nam Dong, but on arriving over the camp they were unable to land due to intense fire and had to return to Da Nang..
A U.S. Army CV-2 Caribou managed to drop ammunition into the camp and Republic of Vietnam Air Force (RVNAF) A-1 Skyraiders carried out airstrikes on the PAVN/VC around the camp.:158
At 09:45 18 HMM-162 UH-34Ds escorted by 4 UH-1Bs and 2 RVNAF A-1s began landing a 93 man relief force and extracting the wounded. At 15:45 a further flight of 10 UH-34s delivered ammunition and equipment to the camp but by this time the battle was over.:158
Allied losses were 2 U.S., 1 Australian and 50 CIDG killed, while the PAVN/VC left 62 dead around the camp.:158