It went----poorly. I believe Ft. Sumter is at Charleston and it was South Carolina that left the Union first.
Some big mistakes were made, but the end result was inevitable, No country can survive when real sanctions are applied. Sanctions such as Barricading the ports and Borders. When one part of a divided country has 95% of the Navy and 75% of the industry and twice the population,the other half hasnt got much of a chance. The boys from down south put on a good show though. In order to beat them the North had to throw away the Constitution. Lincoln broke most every Article of the Constitution.
I think during the first year...or perhaps even some of the latter years...it has been pointed out that had the South successfully crossed into the North...cut the major railways...and threatened key segments of their industry...they could have forced the North to seek a truce, but Davis was opposed to invading the North....and Robert E. Lee was opposed to going into northern cities and crippling their industry.
I hope we don't have to do that to defeat the Islamofascist enemy of our time.