So, France gave the US a LOT of help during the American Revolution, to the point where it put France in debt. France also used to control the land west of the Proclamation Line of 1763, as part of New France. So let's say as a sort of repayment, the US gives it back, effectively limiting American settlers to land east of the Appalachians. Would this have been plausible at the time? Would it have led to better treatment of the Natives, being in French territory rather than American? Would France even be interested in the land?