Mississippi River.
da misss'ippi riivuh yo.
the Mississippi River
1783
Hawi
The Rocky Mountains formed the new western boundary of the US after the Louisiana Purchase in the early 19th century.
the Mississippi River.
The Mississippi River
proclamation 1763
it isn't the Mississippi
i am not so sure about 1783, but i am sure that the river that became the western boundary of the united states as the result of the revoltionary war is the MISSISSIPPI RIVER.
In 1802, the Mississippi River formed the western boundary of the United States. The southern boundary extended to the 31st parallel north latitude.