How did US involvement in Vietnam change over time? O O O O O
Select all that apply.
The United States sent more and more troops to Vietnam in the 1960s.
The United States turned over defense of South Vietnam to the South Vietnamese army.
The United States took over the defense of South Vietnam.
The Gulf of Tonkin Incident led the United States to declare war on North Vietnam.
The Gulf of Tonkin Resolution gave the president more authority to get involved in Vietnam.