The Franco-American alliance refers to the 1778 alliance between Louis XVI's France and the United States, during the American Revolutionary War.

Campaign in America

thumb|Benjamin Franklin's reception at the Court of France in 1778.The alliance was promoted in the United States by Thomas Jefferson, a Francophile. Based on the Model Treaty of 1776, Jefferson encouraged the role of France as an economic and military partner to the United States, in order to weaken British influence.

Support and treaty of alliance

In 1776, Latouche Tréville transferred ammunition from France to the United States of America. Numerous French supplies as well as guns of the de Valliere type were used in the American War of Independence, especially the smaller 4-pounder field guns. The guns were shipped from France, and the field carriages provided for in the US. These guns played an important role in such battles as the Battle of Saratoga, and the Siege of Yorktown. George Washington wrote about the supplies and guns in a letter to General Heath on 2 May, 1777:

On 13 June 1777, the Marquis de Lafayette reached America and joined George Washington in the Continental Army as Major General. He participated to the Battle of Brandywine where he was wounded, and later served at the Battle of Rhode Island. Lafayette would later return to France during the war in order to advocate more support for the American cause.

The alliance was formally negotiated by Benjamin Franklin and the 1778 Treaty of Alliance was signed on February 6 1778 after the American victory at the Battle of Saratoga, under the designation of "Franco-American Treaty of Amity and Commerce". The treaty gave open support from the French Army, Navy and Treasury, and spelled that the United States was obligated to guaranty "from the present time and forever, against all other powers (...) the present Possessions of the Crown of France in America", in exchange for a promise not to increase French possessions anymore in America.

Operations

The combined strength of the Americans and the French virtually guaranteed victory against Great Britain. France successfully supported the American War of Independence, managing to expel the British and obtain recognition of American independence through the intervention of Rochambeau, La Fayette, de Grasse, or Suffren.

European front

Naval conflict started in European waters with the Battle of Ushant in July 1778, and continued with the attempted invasion of England with the Armada of 1779.

1st American campaign

In the summer of 1778, French Admiral d'Estaing arrived with a fleet and infantry reinforcements for the war with a fleet of twelve ships of the line and fourteen frigates. On 6 July 1779, he successfully fought the Battle of Grenada against Admiral Byron, but failed at the September 1779 Siege of Savannah before returning to France. Actions continued in April 1780 with Guichen against Admiral Rodney in the Battle of Martinique.

2nd American campaign

In 1780, Rochambeau arrived with a fleet and 6,000 French troops to join the Continental army, under George Washington, in the "Expédition Particulière", landing in Newport, Rhode Island, on 10 July. In the Ohio valley, French Americans would also combine with Indian troops, as in the Battle of Kekionga in 1780 under Augustin de La Balme.

The French Navy played a decisive role in supporting the American side, as American could hardly resist the British Navy. The French under de Grasse managed to defeat a British fleet at the Battle of the Chesapeake in 1781, thus ensuring that the Franco-American ground forces would win the ongoing Siege of Yorktown, the last major land battle of the American Revolutionary War. The British surrendered to American and French forces at Yorktown in 1781.

France continued to fight against the British in the 1782 Antilles War.

Campaign in India

thumb|[[Pierre André de Suffren de Saint Tropez|Suffren with Indian ally Hyder Ali in 1783.]]
France further supported the war effort against Great Britain by attacking British possessions in India. In 1782, Louis XVI sealed an alliance with the Peshwa Madhu Rao Narayan. Suffren became the ally of Hyder Ali in the Second Anglo-Mysore War against British rule in India, in 1782-1783, fighting the British fleet on the coasts of India and Ceylon..

Between February 1782 until June 1783, Suffren fought the English admiral Sir Edward Hughes, and collaborated with the rulers of Mysore. Suffren fought in the Battle of Sadras on February 17 1782, the Battle of Providien on April 12 near Trincomalee, the Battle of Negapatam (1782) on July 6 off Cuddalore, after which Suffren seized upon the anchorage of Trincomalee compelling the small British garrison to surrender. An army of 3,000 French soldiers collaborated with Hyder Ali to capture Cuddalore. Finally the Battle of Trincomalee took place near that port on September 3. These battles can be seen as the last battles of the Franco-British conflict that encompassed the American War of Independence, and would cease in 1783 with the signature of the 1783 peace treaty.

Aftermath

Finally, the Treaty of Paris was signed on 3 September 1783, recognizing American independence and the end of hostilities.

The 1778 Treaty of Alliance, promising the defense of French territory in the American continent, failed to be observed by the United States as soon as 1793, when France entered in conflict with Great Britain in the Caribbean. All the U.S. could do was maintain neutrality, but this neutrality was so negative as to forbid the French the right to equip and arm privateers in American ports, or the right to dispose of French prizes in the United States. These reluctances in effect marked the end of the alliance.
thumb|Naval encounter during the USS Constellation and French ship L'Insurgente on 9 February 1799./" class="wiki">Quasi-War between USS Constellation and French ship L'Insurgente on 9 February 1799.
As the United States entered into a treaty of commerce with Great Britain in 1794, France started to raid American shipping, seizing 316 ships in 1796. In 1796, the disillusioned Minister Pierre Adet explained: "Jefferson (...) is American, and as such, he cannot sincerely be our friend. An American is the born enemy of all the European peoples", and in 1798, the XYZ Affair considerably worsened Franco-American relations.

The events led to the Quasi-War (1798-1800) between France and the United States, with actual naval encounters taking place between the two powers, with the encounter between USS Constellation and French ship L'Insurgente on 9 February 1799 off Nevis Island, and USS Constellation and La Vengeance in February 1800 off Guadeloupe. An agreement followed, in which the United States agreed to pay 20 million dollars in compensation, and France agreed to give up its claims to the 1778 Treaty.

See also

• France in the American Revolutionary War

• List of French units in the American Revolutionary War

• Franco-Indian alliance

• French weapons in the American Civil War

French commanders in the alliance