What key events contributed to deepening unrest and hostility in antebellum America? Objective a. Students will study maps and apply that information to create a chart of states' status during the 1800s. b. Students will read, analyze, and discuss primary source documents and interpret this information for their classmates. c. Students will be able to list at least three causes for tension and division between the North and the South in the 1800s. Background Tensions grew for many years before the first shots rang out at Fort Sumter, signaling the beginning of the Civil War. There was a clear Duration: 60 Minutes.