Answer:
Authorized the president to take whatever actions are necessary to end attacks on US forces and allies in Southeast Asia.
The US government adopted the Gulf of Tonkin Resolution in 1964, with President Johnson's support, to use force to defend US troops stationed in Asia (Vietnam). He believes that steps must be taken to ensure Southeast Asia's peace. North Vietnam attacked an American warship in the Gulf of Tonkin.
I hope this helps you
:)