Keeping in mind how the expansion of U.S. territory westward threatened the delicate balance of power in Congress between free and slave states and Lincoln's stance on slavery, describe how key events (such as land acquisitions, agreements about how new territories should enter the Union as states, etc.) led the country into the Civil War.

Additional information

The problem related to Political Science and it explains about how the expansion of US territory westward threatened the delicate balance of power in Congress.

Word limit: 250