Leaders
Many believed that the Confederacy had better leaders, such as Robert E. Lee and Stonewall Jackson, whom were some of the best officers before the war.
Home AdvantageThe Confederate soldiers knew the terrain better than that of their counterparts.
A psychological aspect could be that they were fighting for their land, for their families, which could have been the driving force although they were vastly outnumbered.
Geography
The coastline is longer, which took more time to travel, and therefore capture.
