Well, as a matter of fact the French contributed with some understrenght regiments (2 battalions each) to a total of 14 battalions more or less.
But the Germans did also fought, some Hessians for Cornwallis and some under Washington: von Steuben!
As a matter of fact the real role of the French in this episode was at Chesapeake Bay in which they outnumbered the British 19 ships with their own 24 ships. Anyway it was a tactical stalemate. The strategic importance was due to the later operations on land, which were performed by Washington. The British were outnumbered 3 - 1.
An appeaser is one who feeds a crocodile, hoping it will eat him last.
Sir Winston Churchill