Despite common belief, the American Revolution was more than 13 colonies fighting an oppressive European force; it was a transatlantic conflict involving multiple countries and their colonies. Louisiana, then under the Spanish flag, waged impressive campaigns to attack British territories and undermine the British war effort.
Spain decided to assist the rebels because of their humiliating loss to Great Britain during the French and Indian War, which was the North American theater of the Seven Years War. In 1762, Spain offered to help France in exchange for all of the Louisiana territory west of the Mississippi River, including the city of New Orleans. However, Spain surrendered East and West Florida to Great Britain.