A stupendous American victory in October 1777, the success at Saratoga gave France the confidence in the American cause to enter the war as an American ally. Later American successes owed a great deal to French aid in the form of financial and military assistance.
The American Revolution could have been won without any aid that they been left complete by themselves. The crisis during this revolution was already before the military forces had provided by any help and aid, that came from abroad nevertheless this help was welcome gratefully. They would have won American revolution all by themselves but where happy to receive help from abroad. In which France was the first to shake hands on this later joined by Spain, Holland and Prussia.
Slavery was the most significant cause of the controversy
A lot of people, especially religious people eg) the pope ,were suspicious of widowed women who own cats. they thought that they had the devil in them so they wiped out the cat population as well as their owners.