Talk:Pandemic: Plague Z (Map Game)/@comment-26389738-20170117183345/@comment-26247925-20170118120612

https://en.wikipedia.org/wiki/Monroe_Doctrine

The USA recognises existing European colonies, but is obligated to intervene in the event that a European nation attempts to take control of a North or South American nation. The reason it hasn't been enforced is because it didn't need to be enforced, since no European nations have any ambitions in the Americas, and if they did, they'd be at risk of sanctions and a collapsing economy.