Final answer:
The Battle of Saratoga turned the tide of war in favor of the Americans during the American Revolutionary War.
Step-by-step explanation:
The battle that turned the tide of war in favor of the Americans was the Battle of Saratoga. It was a crucial victory for the American forces during the American Revolutionary War. The British army, led by General John Burgoyne, surrendered to the American forces under the command of General Horatio Gates after a series of battles in Saratoga, New York, in 1777.