How did they cross the Rocky Mountains?

What is a flapper of the 1920S? Why does the wind blow east and west? Which were the two side that fought in the crusades? What nationality is the surname Silliman? How was Rome protected from invasion? How many centuries occurred between ad 1501 and ad 501? Who is Dr. Vivian Thomas? Who would dress a noble in the medieval times? Summarize at least 3 events that occurred in Europe and Asia that led to change during the middle ages? How many horses did Hadrian take to conquer Rome? What is the meaning of the word millennia? What dynasties attempted to cut off trade with the Mongols? What were Europeans perspective on exploration? What year did the christian calendar begin? When was wheeled traffic permitted in early Rome? Which theory would a 17th-century European king mostly likely support? Which regions and continents were connected by Constantinople? What nation formed the western front? Is Wisconsin on the eastern or western? What are three types Spanish settlements in the Americas?