"Monroe Doctrine"

The fifth US President, James Monroe, decreed in 1823 that America would henceforth look upon European attempts to colonise or interfere with lands in the Americas as acts of aggression. Intended to prevent any further colonisation by Europe, at a time when Latin American countries were seceding from Spanish control, the Monroe Doctrine was an audacious announcement from a fledgling nation, but it has stood the test of time.