blockade is somthing that is blocking a door or somthing
here you go france
the usa is not open european colonization
an act or means of sealing off a place to prevent goods or people from entering or leaving.
an official ban on trade or other commercial activity with a particular country.
The Monroe Doctrine was a United States policy of opposing European colonialism in the Americas beginning in 1823. ... President James Monroe first stated the doctrine during his seventh annual State of the Union Address to Congress.