Likely it is Montana, which is in the Missouri River valley, of which 70% to 80% was in the Purchase.
in the Louisiana purchase
The Louisiana Purchase, The Mexican American War, The Purchase of Alaska and the Annexation of Texas.
The state is Louisiana, the southernmost section of the original Louisiana Purchase.
New Otleans was the largest city that was included in the Louisiana Purchase.
The Louisiana Purchase only included the southeastern part of Wyoming.
This is the Louisiana Purchase from the French in 1803.
Largest parish in the state of louisiana