What advantages did the south have in the US Civil War?
Some of the best officers in the US Army had resigned to join the Confederates.
Big advantage in cavalry - most young men owned at least one horse, and were used to the riding and shooting way of life.
Rank-&-file were poor white trash who actively enjoyed a darn good fight.
The President did not have to face a General Election during the course of the war.
Home ground advantage - both tactically, and in terms of emotive war-mission.
(At the beginning) Prospect of aid from Britain and France.