You do realize the communist party of Afghanistan was elected, right? The US funded radical islamism to combat socialism in the middle east. That worked great for all parties involved, didn't it.

"Didn't invade Korea and Vietnam" so they didn't legally declare war. What do you think we ought to call it when you land your military forces in a country, station your navy, air force, and generals there, and draw up front lines against a defending domestic army?

American Imperialism manifests through the installation of friendly governments who will bend over backwards for American companies. Are you familiar with the concept of a "banana republic"? That's how the US invades places. You're semi-subtle about it, good job. Doesn't change the fact the US controls the politics in these states a long time after they've left.