Video: PROFESSOR JOHN MEARSHEIMER: THE SITUATION IN RUSSIA AND UKRAINE | KING'S POLITICS The Monroe Doctrine was a US foreign policy does not allowed foreign force at its borders, why US so naïve felt Russia will allow NATO forces at its borders 門羅主義是美國的一項外交政策，不允許外國軍隊進入其邊界，為什麼美國如此天真地認為俄羅斯將允許北約部隊進入其邊界
