alt Hacker NewsMexico, Puerto Rico, Samoa, Hawaii, Guam, Cuba, Panama, and the Philippines?
In the last 100 years the trend has been been for America to invade a country and try to install a friendly government rather than formally annex them - Vietnam, Korea, Iraq, Afghanistan, Libya, Yemen, Syria.
Oh plus all the overseas military bases: https://en.wikipedia.org/wiki/List_of_countries_with_oversea...
So it's not longer 30 years but 100? What the US did pre WW2 was in no way abnormal or worse than that what every other powerful was doing..
Also US never technically invaded Lybia, Yemen or Syria (unless you count their intervention to support the Kurdish and Iraqi governments against ISIS an invasion...)
What happened in Korea was the opposite of the invasion (of course the South Korea regime they were saving was extremely oppressive and arguably not worse at all than the one in the North at the time).
Also are you implying that the majority of military bases US has in other countries (especially in Europe) is involuntary?