The Appalachian Mountains.
I think it's the Appalachian Mountains, but I'm not sure.
Kentucky was the first state west of the Appalachian mountains, admitted to the Union in 1792.
appalachian mountains
Appalachian Mountains
The Appalachian mountains are on the east of Illinois.
Daniel Boone named the land he founded "Boonesborough." This settlement, established in 1775 in what is now Kentucky, was one of the first American pioneer communities west of the Appalachian Mountains. Boone played a crucial role in exploring and settling the region, which became significant for westward expansion.
Pennsylvania
Pennsylvania
Daniel Boone
The first European settlement in what is now the United States was founded by the Spanish in St. Augustine, Florida in 1565.
The first two that come to mind are the Rocky Mountains and the Appalachian Mountains.