He was faced with either using nukes or invading the north. Either of which risked WWIII. So rather than face defeat (he didn't want to be the first US President to lose a war) he refused to remain commander in chief when his term expired.
FranceFrance
Opposition translated to being against HIM & and not supporting HIM...he burned out; and refused to be president any longer.
The defeat of the south vietnamese forces was happened in the 30th of April , 1975 .
President Johnson believed that the US could defeat north Vietnam because the US had won WWII with firepower, and the US had the most firepower on earth during the Vietnam War.
He had been against American involvement before becoming president. He felt that taking out troops would be a defeat for the United States.
To defeat the South Vietnamese government.
Communists
no because kenndy and mcnara intended to pull our observers out by 1965 Johnson felt that it would be a defeat and increaded our troops.
From the communists: Victory From the US/Allies: Defeat
Communist expansion. During the cold war, it was US policy that the enemy always fired the first shot (they start it first). The only exception to this rule, was...FIRST STRIKE (with nuclear weapons); the US reserved the right to use nukes on an ememy FIRST (for obvious reasons). President Kennedy began US support for the South Vietnamese government in its battle against the Viet Cong (VC) by sending military advisors. President Johnson later sent combat troops, aircraft and naval units to combat the VC and then later the North Vietnamese regulars (NVA) troops. President Johnson initiated US bombing of military targets in North Vietnam. The War in Vietnam (or French Indo-China) had begun after World War 2, involving the French and the Communists. Although the US had indirectly provided some logistic support to the French up until their defeat in 1954, the US was not directly involved in the war until the 1963-1964. The communists governments of China and especially the Soviet Union had provided a great deal of support to the communist North Vietnamese throughout the war. It was this support that allowed the North Vietnamese government to wage war on South Vietnam, then later Laos and Cambodia. This was the exact intent of the communist governments that supported North Vietnam.
The Tet offensive did occur in 1968.In January of 1968, the North Vietnamese and Viet Cong attack various cities in South Vietnam. American and South Vietnamese troops repelled the attack, but they also suffered heavy losses. This conflict lasted for a few months during 1968.
General Westmoreland said he could defeat the communists if he had more men. So he received more men. Later, he requested more men...he got them. Then again...then TET came in '68; the country was rocked! New commander; Abrams...no more men.