The Monroe Doctrine is an expression of nationalism for the following reasons. First, for a long time, the United States territory was open for European colonization which was the cause for many conflicts between colonists and between Indians. The Monroe Doctrine finished for once the European expansion into United States territory, which would no longer cause trouble for the Americans. Also, the Monroe Doctrine made clear that the Americans would stay out of European affairs such as wars, and colonies already stablished, leading safety and peace between the two countries. The Monroe Doctrine specified that The United States would regard any interference in Western Hemisphere affairs as a threat to its security. This would make the Europeans
