Which 1778 alliance did the American victory at Saratoga help secure during the Revolutionary War?

The American victory at Saratoga helped secure the Treaty of Alliance (1778) between the United States and France.

The treaty was signed in Paris on February 6, 1778, by American commissioners Benjamin Franklin, Arthur Lee, and Silas Deane, along with French representative Conrad Alexandre Gérard. It created a defensive military alliance during the Revolutionary War.

News of the British surrender at Saratoga in October 1777 persuaded French leaders that the American cause could succeed. France then moved from secret assistance to formal support, supplying troops, ships, weapons, money, and diplomatic recognition.

The treaty was signed alongside the Treaty of Amity and Commerce, which established commercial relations and recognized American independence. French involvement became decisive at Yorktown in 1781. The alliance later weakened during the French Revolution and was effectively ended by the United States’ neutrality policy.