Titles: How Did Slaves Find a Route to Freedom? How Did Tea and Taxes Spark a Revolution? How Many People Traveled the Oregon Trail? What Difference Could a Waterway Make? What Was the Continental Congress? What Was the Missouri Compromise? When Did Columbus Arrive in the Americas? When Did George Washington Fight His First Military Battle? When Were the First Slaves Set Free During the Civil War? Where Did Sacagawea Join the Corps of Discovery? Who Was Sitting Bull? Who Was William Penn? Who Were the Accused Witches of Salem? Why Did Cherokees Move West? Why Did English Settlers Come to Virginia? What Are the Articles of Confederation?