France and Spain floated distinctly different proposals for an American Settlement to apportion territory to the United States. The French had the most restrictive plan, with a western boundary for the US at the Appalachian Mountains, matching the British 1763 Proclamation Line. The Spanish allowed for some additional Mississippi River Basin upland just west of the Appalachians for the US. But it also required that the British cede its colony of Georgia to Spain in violation of the Franco-American alliance of 1778.