the president had a small penis and coudent fight it himself
The US Civil War (1861-1865) & the Vietnam War (1961-1975).
It authorized the president to send troops into battle
Dwight Eisenhower (1890-1969) was President in 1959 when the Vietnam War began. About 900 US military advisors were sent to the area. President John F. Kennedy supported the anti-communist regime of South Vietnam, providing increased aid and support. In 1964, President Lyndon Johnson used the Gulf of Tonkin incident to push Congress to authorize the direct deployment of US troops.
Presidents do not need the approval to send troops anywhere in the world. However, generally the president attempts to have a consensus with Congress when sending troops somewhere.
The President can order military strikes without consulting Congress. He needs money for a war of any duration and only Congress can authorize the spending of money. Only Congress can declare war, but if Congress approves money, undeclared wars can last a long time and use hundreds of thousands of troops as in Vietnam. Wars of any kinds can be also be called (military) interventions and peace-keeping operations.
When President Nixon took office there was approximately 536,100 American troops in Vietnam. President Nixon immediately started reducing the number of troops in Vietnam.
Under the War Powers Resolution, the President is required to report to Congress within 48 hours after introducing troops into hostilities or situations where hostilities are imminent. However, the President has 60 days to continue military actions without a declaration of war, with an additional 30 days for the withdrawal of troops. If Congress doesn't authorize the use of military force during this period, the President must cease those operations.
NIXON
The resolution allowed President Johnson to commit more troops to South Vietnam without the approval of Congress.
President Eisenhower sent US troops to Vietnam in 1955, President Ford pulled out the last US troops in 1975.
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The Gulf of Tonkin Resolution.