Answer:
Thomas Jefferson, France.
The French Naval support at Yorktown prevented the British from reinforcing and/or evacuating their troops, forcing their surrender.
Americas support the ongoing struggle by Cubans and Filipinos against Spanish rule and the mysteries explosion of the battleship caused them to declare war against Spain
If you are talking about the Revolutionary War, I believe that the French brought the Patriots supplies when they were in need.
1. I knew someone from Romania who couldn't come to the US for not tucking in the string on their sweat pants.
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