Why was the Lewis and Clark expendition launched?

What were the positive and negative effects of the reconstruction era? How did Americans help win WW1? What did the north and the south believe about the duration of the war at the beginning of the civil war? What are some intertesting facts about Mary downing hanh? What was the price of a hamburger in the 1930's? What is the value of 1886 silver dollar coin? Did slavery start in 1820? Animals with dome shaped shelter? What problems did dorothea dix uncovered? What is the value of a Twenty dollar US gold coin with lady liberty on one side plus a front image of eagle on back? What was the American army called during the American Revolution? Value of a 1998 walking liberty dollar? How was much of the south had to be rebuild result of the civil war? What is the value of a 1789-1797 George Washington 1 dollar coin? What were the advantages and disadvantages of the United states staying neutral in World War 1? What role did the North Star play in slavery? Why didn't Britain want to give colonists freedom? What is the value of a 1907 liberty head v nickel? Why was slavery is a powerful issue? One possible reason that a discharge petition is seldom successful is that?