Which event happened first during the sequence of significant Civil War events?

The Civil War began in 1861, marking the start of a significant and transformative conflict in American history. This event is the foundational moment for all subsequent events listed, as it set into motion the series of battles and political maneuvers that characterized the war. The Battle of Mobile Bay occurred later in 1864, the Battle of Gettysburg took place in 1863, and General Robert E. Lee's surrender to General Ulysses S. Grant happened in 1865. Understanding the timeline of the Civil War helps clarify the progression of significant battles and pivotal moments that unfolded after the war officially commenced. This context reinforces the importance of recognizing the beginning of the war as the first step in a sequence of events that shaped the nation.