Answer:
The event that made France decide to help the Americans in the Revolutionary War was the Battle of Saratoga in 1777.
Explanation:
The objective of France was to weaken England, to prevent it from becoming more powerful and to take revenge for the defeat it suffered in the Seven Years' War. After the US capture of the invading British army at Saratoga (1777), and after the French Navy was rehabilitated, France was ready. In 1778 France recognized the United States as a sovereign nation, signed a military alliance and created coalitions with the Netherlands and Spain, which kept Britain without a significant ally to help it.
It gave the Americans grants, weapons, loans, and sent an army to serve under George Washington, that prevented the second British army from escaping from Yorktown in 1781. For all, France spent approximately 13 billion dollars in current currency to support Americans directly, not including the money they spent fighting against England on land and sea outside the United States.
