What were the eastern boundaries of the US after the Louisiana Purchase?

Answer 1

The eastern border of the United States was still the Atlantic Ocean, but after the Louisiana Purchase in 1803, the western border wasn't well defined. We bought the place from France, and even the French weren't entirely sure what they were selling, or what we were buying. Nominally, the Louisiana Purchase included all of the land drained by the Mississippi River, so the western border should have been the Rocky Mountains and the Continental Divide.

Answer 2

The eastern border of the United States was still the Atlantic Ocean, but after the Louisiana Purchase in 1803, the western border wasn't well defined. We bought the place from France, and even the French weren't entirely sure what they were selling, or what we were buying. Nominally, the Louisiana Purchase included all of the land drained by the Mississippi River, so the western border should have been the Rocky Mountains and the Continental Divide.

Answer 3

The same as it was before the Louisiana Purchase: the Atlantic Ocean.

The Louisiana Purchase (Mississippi River Valley) altered the western boundaries of the US, extending it to Texas and Mexico in the Southwest, and the nominal Spanish and Mexican claims along the Rocky Mountains.