America's role in the world at the end of the American's Revolution was like a explorer， because The US just get the independence from the world strong power Britain. And no one knows what the future of the US, The US just like a explorer to explore his way
America's role in the world at the end of the war of 1812 was like a rising star, because that's the second war between The Britain and the US, and this battle let the US won the international prestige
America's role in the world at the end of the Monroe doctrine was like a man who wants to protect the home and do not want to join the war. Because the purpose of Monroe doctrine is to protect the American, and it gives the area .