The US.
Lyndon Johnson :) hope I helped!!!! Have a good day!
Conventional forces in large numbers began arriving in country in '65.
Eisenhower sent the first official US troops over there on or about 11 February 1955.
Canada did not send combat troops to Vietnam during the Vietnam War. Instead, Canada maintained a stance of neutrality and provided support through diplomatic means and humanitarian assistance. While some Canadians served in non-combat roles, such as in medical or advisory capacities, the country as a whole did not participate in the military conflict.
NIXON
deploy combat troops to vietnam
Eisenhower, Kennedy, LBJ, and to a certain extent Nixon & Ford sent US military men to South Vietnam. The term "troops" can be misleading. In the US Army Armored Cavalry Squadron's, TROOPS are companies commanded by a Captain. Example: "F" Troop, "C" Troop, etc. Military men sent to Vietnam under the Eisenhower administration were combat troops; but acting in an advisory manner. Kennedy sent combat troops; also acting in an advisory manner, but also killing enemy soldiers in special operations. That's combat! If you're looking for the term that describes regular US infantrymen, be they US Army or US Marine Corps; then President LBJ sent in "Regular" US infantrymen/marines, armor crewmen (known as tankers to civilians), and artillerymen in 1965. NON-combat troops are cooks, truck drivers, medics, mechanics, clerks, and in Vietnam Military Policemen, to name a few.
1903
1965
From the Mekong Delta (IV Corps) to the DMZ (I Corps); from the China Sea to the borders of Laos & Cambodia. RVN was blanketed with GIs.
Several: Dwight D Eisenhower (1952-60) was President when the US first sent military advisors to Vietnam, followed by John F Kennedy (1961-63); Lyndon B Johnson (1963-68), who first sent combat troops; Richard M Nixon (1969-74), who withdrew all combat troops under intense pressure from Congress and the public; and Gerald R Ford (1974-76), who was President when North Vietnam defeated South Vietnam.
Several. Australia, New Zealand, The Philippines, Thailand, and the Republic of Korea (South Korea) sent troops to Vietnam.