Leading up to the Civil War, which of the following events occurred first?

The Compromise of 1850 was a significant legislative package aimed at resolving various disputes regarding slavery and territorial expansion following the Mexican-American War. This set of laws included provisions that dealt with the status of territories acquired from Mexico and attempted to balance the interests of free and slave states. The passage of the Compromise marked a pivotal moment in American history, addressing tensions that were mounting in the years leading up to the Civil War.

Subsequent events, such as the Dred Scott decision in 1857, further inflamed the national debate on slavery and its extension into new territories. Likewise, the raid at Harper's Ferry led by John Brown in 1859 was a direct response to the escalating conflict over slavery, and Abraham Lincoln’s election in 1860 signified a turning point, as it solidified the fragmentation of the Union along sectional lines. Each of these events built upon the earlier compromises, underscoring their importance within the broader narrative of rising tensions and the eventual outbreak of the Civil War.