Life during the colonial period and under the New American- What changed, and what stayed the same?

What is intervention ? in government terms

The edict of nantes states a: protestantism was to be the official religion in france b: huguenots would rules france and allow catholics to practice freely. c: catholicism was to be the official religion in france but protestants could worship freely. d: catholicism was to be the official religion in france and protestantism was to be outlawed.

Why was the gulf of tonkin resolution important