The american victory at saratoga was the greatest loss that the british had ever suffered? true or false

  True

Explanation:  

"The Battle of Saratoga in 1777" was a defining moment in "the Revolutionary War". "American powers encompassed and vanquished the British" armed force under "General Hohn Burgoyne at Saratoga in New York State". So this made the best misfortune for the British that had ever endured.

"The Battles of Saratoga" ("from September 19 and October 7, 1777") was set apart as the peak of the "Saratoga crusade". As a general rule, Britain may well have won the war. But, the fight for "New York in 1776 gave England a fantastic open door" for a definitive triumph. So this made the British to hold its defeat.