Which 1778 treaty formally created the Franco-American alliance during the American Revolutionary War?

The Treaty of Alliance formally created the Franco-American alliance during the American Revolutionary War in 1778.

The United States and France signed the treaty at Paris on February 6, 1778. It accompanied the Treaty of Amity and Commerce, which established commercial relations and French recognition of the United States. The alliance treaty committed France to support the American cause and required the United States not to make a separate peace with Britain.

France’s involvement supplied weapons, money, troops, naval power, and diplomatic support. French assistance was crucial at Yorktown, where the French fleet helped prevent British reinforcement or evacuation. The alliance also widened the war into a global conflict involving Britain and other European powers.

The treaty did not itself end the Revolution. The United States and Britain later signed the Treaty of Paris in 1783. The Franco-American alliance remained significant until the Convention of 1800, which ended the formal alliance after disputes during the French Revolutionary period.