Privateer on shipping of a nation at war with France, on behalf of the French Crown. Seized vessels and cargo were sold at auction, with the corsair captain entitled to a portion of the proceeds. Although not French Navy personnel, corsairs were considered legitimate combatants in France (and allied nations), provided the commanding officer of the vessel was in possession of a valid Letter of Marque (fr. "Lettre de Marque" or "Lettre de Course"), and the officers and crew conducted themselves according to contemporary admiralty law. By acting on behalf of the French Crown, if captured by the enemy, they could
Naval battles of the American Revolutionary War against patriot communities. Colonial forces could do little to stop these developments due to British naval supremacy. In 1777, colonial privateers made raids into British waters capturing merchant ships, which they took into French and Spanish ports, although both were officially neutral. Seeking to challenge Britain, France signed two treaties with America in February 1778, but stopped short of declaring war on Britain. The risk of a French invasion forced the British to concentrate its forces in the English Channel, leaving its forces in North America vulnerable to attacks. France officially entered the war on 17 June 1778, and the