How did the Gulf of Tonkin Resolution affect the US involvement in the Vietnam War

A. It sent the first u. s. troops to Vietnam thus establishing a precedent

B. It authorized Operation Rolling Thunder which led to more troop involvement

C. It gave the president the ability to send troops without Congressional approval

D. A declared war making the commitment of US troops necessary

it is c; It gave the president the ability to send troops without congressional approval.

Explanation:

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The Gulf of Tonkin incident and the subsequent resolution of the Gulf of Tonkin provided the justification for a further US escalation of the conflict in Vietnam.

What led Johnson and his advisers to order the US Army to launch Operation Rolling Thunder, a bombing campaign against the North.

Johnson also authorized the first of many deployments of regular ground combat troops to Vietnam to combat the Viet Cong in the field.

The correct answer is the C: It gave the president the ability to send troops without Congressional approval.