Today in History, December 2, 1823:
President James Monroe announces in his State of the Union address what will become known as the Monroe Doctrine…telling the European powers that America would not interfere in European conflicts (we didn’t want to and did not have the means anyway), and that America would police the western hemisphere…Europeans were to stay out. We couldn’t really enforce this doctrine at the time, but it was to England’s benefit…so the Royal Navy did so for us.
In 1904, when European powers attempted to collect on supposed debts the Americas, Theodore Roosevelt added the Roosevelt Corollary to the Monroe Doctrine. The Corollary again told outsiders that if there were problems in finances in Western Hemisphere countries, the US would handle it.
The Doctrine has been tested repeatedly over the years, most notably and dangerously during the Cuban Missile Crisis of 1962 when the Soviet Union attempted to place nuclear missiles 90 miles off America’s southern shores. President Kennedy responded with a Naval Embargo, and after a few days Soviet leaders blinked.