Infantry Fighting Vehicles are BMPs and Armored Personnel Carriers are BTRs.
There were many American vehicles in World War 2. These vehicles included the Army tanks, armored cars, cruiser tanks, infantry tanks, and armored personnel carriers.
Basically... the Army, as in the normal military. Mostly troops that are land-based in their operations, just plain (mostly) frontline fighters, like in Roman times, they'd be the main group of foot soldiers.
Australia sent some tank units and mechanized infantry units to Vietnam, as well as some infantry elements. The Australian's used British Centurian tanks and US supplied M-113 Armored Personnel Carriers. Australia lost approximately 600 men KIA during the war.
An armoured personnel carrier is an armoured vehicle used to carry infantry soldiers in combat.
soilders infantry
For WW2: Armored Infantry Divisions were equiped with half-tracks. Regular Infantry Divisions walked (or trucked). During the Vietnam War those Armored Infantry Divisions gave way to the new MECHANIZED INFANTRY DIVISIONS, equipped with M-113 APC/ACAV (Armored Personnel Carriers/Armored Cavalry Assault Vehicles). Only one US Army Mechanized Infantry Division was in Vietnam (and only it's 1st Brigade); the 5th Mechanized Infantry Division (Red Diamond Patch). Regular Infantry Divisions in Vietnam were called "Straight Legs", "Straight" meaning...straight foot soldiering.
Australia sent armor, mechanized, and infantry units to Vietnam. Which utilized the British Centurian tank, and the US M-113 Armored Personnel Carriers. Approximately 600 Australians paid the ultimate price.
Over 50,000 Australians fought in the Vietnam War, over 19,000 of them were draftees. Australians fought, using Centurian Tanks, US Armored Personnel Carriers (M-113's), field artillery, and infantry.
Which country did the 28th Infantry Division come from?
An APC is an armored personnel carrier - an armored vehicle for carrying infantry soldiers in combat.
The Army has changed drastically for the 21st century. During the 20th century's Vietnam War, a "Leg Outfit", just boot leather (No M-113 APC/ACAV-Armored Personnel Carriers/Armored Cavalry Assault Vehicles); was approximately 600 men.
"Grunt" is a term used to denote infantry personnel in both branches.