Which 1777 American victory is widely called the turning point of the Revolutionary War?

The Battles of Saratoga are widely called the turning point of the American Revolutionary War.

The campaign included major engagements near Saratoga, New York, on September 19 and October 7, 1777. American forces commanded by Horatio Gates, with important battlefield leadership from Benedict Arnold and others, defeated the British army led by General John Burgoyne. Burgoyne surrendered his army on October 17.

The victory had consequences beyond the battlefield. It persuaded France that the American cause had a realistic chance of success, helping produce the Franco-American alliance of 1778. French military aid, money, supplies, and naval support became crucial to the eventual American victory.

Yorktown is another common answer because General Cornwallis surrendered there in 1781, effectively ending major combat. Saratoga, however, is the campaign most often identified as the war's turning point because it changed international support for the American rebellion.