Differences between the North and the South were readily apparent well before the American Revolution. Economic, social and political structures differed significantly between the two regions, and these disparities only widened in the 1800s. In 1861, the Civil War erupted between the two sides, and much of the conflict surrounded sectional differences. Once the war ended, Reconstruction lessened some sectional disparities but increased others.
Answer:
joint session - When the House and Senate adopt a concurrent resolution to meet together to conduct formal business or to hear an address by the president of the United States.
BC=Before Crist
AC=After Crist