Civil War Year By Year

In hindsight, we can say no one man or event served as a catalyst for the Civil War. It was not the John Brown Raid, no matter how many historians say it was the pivotal event. It was not the election of Abraham Lincoln, and the war was not about slavery - not in the beginning anyway. The Civil War got its start 73 years earlier when the Founding Fathers set aside the hot potato that was slavery - so they could ratify the Constitution. The signers knew they were passing the issue on to a future generation. Their hope was their progeny could answer the questions they could not. 

Not everyone sensed it right away, but after McClellan was dethroned in the fall of 1862, the focus of the war had shifted ever so subtly. Before that, the war was about reconciliation and bringing the two sides back together - with or without slavery. After Antietam and the Emancipation Proclamation, there was no going back. The purpose of the war had changed. It was no longer about reuniting the two sides but about total victory, crushing the South, and eliminating slavery.