was based at Dầu Tiếng from December 1966-June 1967. On 1 August 1967 the 3rd Brigade became part of the 25th Infantry Division, while the 25th Infantry Division's 3rd Brigade at Đức Phổ Base Camp became part of the 4th Infantry Division.[3] The 3rd Brigade was based at Dầu Tiếng from March 1968-July 1969 and from August–November 1970.[2]: 145
On 24 June 1967 a Vietcong (VC) mortar attack on Camp Rainier disabled 29 UH-1 helicopters of the 188th Assault Helicopter Company.[4]
On 4 July 1968 the base was subjected to a heavy People's Army of Vietnam (PAVN) rocket and mortar attack followed by probes on the base perimeter resulting in 5 U.S. and 16 PAVN killed.
On 23 February 1969 the base was attacked by PAVN sappers. SSGT Robert W. Hartsock would be posthumously awarded the Medal of Honor for his actions during the attack.[5] 21 U.S. and 73 PAVN were killed in the attack.