"Torpedo Boats" (not gun boats) of the North Vietnamese Navy's 135th Torpedo Boat Squadron attacked the destroyer USS Maddox in the Tonkin Gulf on 02 August 1964.
The Vietnam war
Ho Chi Minhi
The North Vietnamese attacked in force and Vietnam was reunited as a Communist state.
Ho Chi Minhi
Because the North Viet Navy attacked the US Navy in the Tonkin Gulf.
The buildup of US troops in South Vietnam was accelerated after the Gulf of Tonkin incident, in which North Vietnamese gunboats attacked ships of the US Seventh Fleet off the coast of North Vietnam.
Communists.
Vietnam was part of the cold war.
Communist infiltration into South Vietnam.
in 1955
I don't believe Germany ever attacked Vietnam.
The French Indochina War most likely led to the (so called) American Vietnam War. Because the French war divided up the country into TWO nations; North & South Vietnams. When the communist led North Vietnam attempted to take over (conquer) South Vietnam... this led to US involvment.
The Vietnam war
President Lydon Johnson lied to the American People that USA Navy Destroyers had been attacked at the Gulf of Tonkin by North Vietnamese Torpedo Boats. This lie led to the Tonkin Resolution, which led to the Vietnam War, 1965 to 1975. President LBJ said that the US Navy Sailors were probably just shooting at Flying Fish, when they claimed they were attacked by North Vietnamese enemy warships. LBJ lied so he could get permission from the Congress to attack North Vietnam.
See answer below.
The US was attacked.
The Vietnam War