Because the British kept on taking away more of there rights and they were doing taxation without representation which basically means that they were taxing the colonist without the colonist having a representative over in Britain to speak for them.
Saigon was renamed H0 Chi Minh city
Light Green, brown, purple, blue
, is the answer.
There's no defined Primary mission, but really they're the replacement (along with NATO) to the League of Nations formed after WW1. The UN try to maintain world peace and stop terrorism. In many ways, you could call them a world police.