What were the major consequences of the civil war?

A. The nation was reunited and the southern states were not allowed to secede. B. The South was placed under military rule and divided into military districts. Southern states then had to apply for readmission to the Union. C. The Federal government proved itself supreme over the states. Essentially this was a war over states rights and federalism and the victor was the power of the national government. D. Slavery was effectively ended. While slavery was not officially outlawed until the passage of the 13th amendment, the slaves were set free upon the end of the war. E. Reconstruction, the plan to rebuild America after the war, began. F. Industrialism began as a result of the increase in wartime production and the development of new technologies.