What is the first mountain range west to the great plains?

How was the concept of king invented? Who were the explorers during the age of exploration? Which innovation ed directly to these developments European Renaissance? What did European explorers wear in the 1700s? What did the Europeans find in the crusades? What group was most interested in bringing civilization to non- Western people? What did the woodkern do? What were the accomplishments of the first crusade? What was the most horrible punishment in the medieval times? What was The civilization that stood near the Mississippi Valley region that traded with over half the continent some 3500 years ago called? Were does the name Corniel come from? How many soldiers could a roman centurion command? Who was slavs? What Measurement from the primitive era to the modern times? What is a Mediaval tannery? Who invented the washing machine from 1920-1930? What are some alternatives to aqueducts? Who did west Virginia fight for during the civil war? Where does the name Killian come from? How did Roman art and literature blend different traditions?