President Johnson uses the Gulf of Tonkin (or USS Maddox) incident to push through Congress a resolution to give him:

Ability to take all necessary measures to stop any and all armed attacks against the United States and to prevent any further aggression swiftly

Explanation:

pretty sure the answer explains it, but basically Vietnam allegedly attacked two US Naval invaders which led to Congress passing that resolution and then caused the American involvement in the Vietnam war (if you need any more elaboration let me know, I hope this helps)

international economic development agencies harm poorer nations by encouraging them to serve as exporters to wealthier nations.