Disadvantages

While it is true that the North had the upper hand in terms of travel efficiency, manpower, presidential leadership, and supplies, the South still had a decent chance of winning. The Confederacy doesn't need to invade the Union; all the Confederates needed to do is win enough major battles to persuade the Union to let them be. Because of this, the Union is the one that's going to have to go into Southern territory. The Confederates, with their better knowledge of the land, would've been able to overcome the advantages the Union even with horrible weapons. Another factor that helped the Confederates was that the Confederates knew what they were fighting for. Though some where fighting to keep the Union away and others were fighting for slavery, they South had clear reasons to fight. The Union, on the other hand, sometimes questioned why they were fighting. If Union soldiers didn't even know what they were fighting for, they might have deserted or lowered their performance in battle. So while the South was at a disadvantage, it was still possible for them to win. With smart tactics and strategies, the Confederates might've been able to pull through.