Witch posed the greatest challenge to pioneers crossing the Western mountains?
- overpopulated rest areas
-lack of water
-hot desert sand
-steep and dangerous passes

The middle east is the best association with which international traded product

What kind of contact did christopher columbus and native americans initially have?

Plz which of the following spanish conquistadors did not explore large parts of what is now the united states? a. juan ponce de leon. b. hernando cortés. c. hernando de soto. d. francisco coronado.