Surrender
The eighth installment of Ken Burns' Civil War documentary deals with (among other things) these main topics within the North/South conflict:

-Union General William T. Sherman's destructive march through Georgia and South Carolina, burning everything in his path so as to leave nothing behind for the Confederates to possible regroup with.

-The ultimate breakthrough of Union forces at Petersburg, leading to the takeover of Richmond, foreshadowing the eventually Confederate surrender.

-After initially vowing to fight on in spite of being severely outnumbered and on the run, Southern President Jefferson Davis finally realizes his cause is futile and surrenders, with Robert E. Lee and U.S. Grant official signing the resignation documents at Appomattox Court House.