April '75 to conduct evacuation operations during the fall of Saigon. Although officially, President Ford dispatched US Marines to recapture the SS Mayaquez from Cambodian communists (sometimes referred to the eye catching term "pirates", although the Mayaquez was taken while on the high seas...legally making it piracy) in May '75; which MANY historians count as the last battle of the Vietnam War.
Even though the US pull out had commenced in 1969, REPLACEMENT personnel were still ROTATING "in country" up until 1975, when the embassy was evacuated by US servicemen.
Evacuation of Saigon April '75.
The US re-deployed from the place.
Amongst the smallest elements deployed there. About 2 battalions of NZ artillerymen were sent to South Vietnam. Of special note however, NZ men were all volunteers. Australia, US, etc. deployed draftees &vol.
Approximately 12,000 US helicopters were deployed in Vietnam.
The Kentucky Army National Guard 2/138th Field Artillery was deployed to South Vietnam.
A one star US Army General (Brigadier General-for Brigade Commander). A US Army brigade is authorized a full Colonel as commander; if the brigade is deployed alone (without a division), such as the 1st Brigade of the 5th Mechanized Infantry Division was in Vietnam (the only one to be deployed as such); then that brigade is authorized a General to command it; hence a Brigadier General.
Legends says that US used Extensive Helicopters to deploy its soldiers in tough terrain of Vietnam.
The US commenced bombing North Vietnam, and deployed tanks, artillery, and infantry divisions for combat in RVN (Republic of South Vietnam). Vietnam was a guerrilla war NO MORE.
The Recon (Reconnaissance) Marines are US Marines; the US Marine Corps was deployed to Vietnam in 1965. Scout=Recon/Scouting=Reconnaissance. Reconnaissance=gathering information Military information=Military intelligence
Infantry may be stationed anywhere the US Army is garrisoned or deployed. In essence, every soldier in the US Army, regardless of his MOS or assignment is infantry.
Predominantly deployed by US Airmen not US Soldiers (predominantly deployed by the USAF not the US Army). If an enemy can be seen, it can be shot (destroyed). AO destroyed forests (jungles) that concealed enemy movements and positions. This agent was replaced by Rome Plows operated by US Army engineers by 1970.
The Australian navy deployed their destroyers Brisbane, Vendetta, Hobart, and Perth to the gunline in Vietnam & fired over 102,000 5-inch shells at the enemy during the war. Australia's Army deployed a regiment of their own Centurion tanks and their Air Force sent B57 Canberra airmen to the war. All other allied forces used US equipment.
The USAF & USN fought in NORTH Vietnam (in the skies); the US Army & USMC fought on the ground in SOUTH Vietnam.