Why did thousands f African Americans migrate north?

What advantage did the maniple system give the roman army? What issues arose in the aftermath of WWII and how did new tensions develop? Why did American use the slogan no taxation without representation? How did people treat the Scottsboro Boys? What can the reader infer about the fears and values of the ancient Greeks based on a description of the cyclops island? What was the major goal of civil rights movements of 1950? What is the subdivision of a naval fleet called? What did smugglers do to be able to smuggle and why did British customs officials accept the money? What ship sank in 1812? What was the Spartan attitude toward wealth? What are some physical features in Alexandria Egypt? Did Ted Williams play for the Padres? How did Alexander the Great introduce Greek ideas to Persians? Why is voter turnout usually so low? What was the cause of South Carolina seceding from the Union in December of 1860? Which of the two images of the earth's layers is to scale? What was the military style of Robert E. Lee? Where did progressives want to see change over? What was Charles Cornwallis character trait? What important part of the roman empire was the roman army in?