If you are referring to France’s aid (such as it was) during the American Revolution:
1. France didn’t help the American Revolution out of charity. France wanted to stick it to the Brits, because the Brits whooped them during the French and Indian (Seven Years) war a decade or so earlier. France was still smarting over the loss of Canada!
2. France (typically) crashed the party when it was almost over. French troops first made landfall at Yorktown; by then the Northeast and MidAtlantic were largely Brit-free; the British were trying to hold on in the South—and since they lost at Kings Mountain and (especially) Cowpens, they weren’t doing all that well in Dixie, either.
Who said anything about charity? Not me.
Very true that France saw a chance to benefit, just as our assiting the removal of the Mullahs would benefit the USA and our good ally Israel.
The process of France acting in their interest, helped us get a start. A good result for others can easily result from our actions, motivated by our self-interests.