The National Liberation Front of South Vietnam, which was a mass political organisation that fought against the United States and its allies. Hope this helps!
It set the stage for further war rather than ensuring longstanding peace
Trade and tea and castles
A country needs rules about citizens cause in reality you cant have random people, bad record or not, coming in your country and just being a citizen instantly without any proof of trust, little do they know they could be a terrorist with the rights of a citizen just cause theirs no way to justify who's one or not.