What problems did the South have during the Civil War?

The South was unable to trade or import/export after the Union had blockaded the ports of the South. The south also had very few factories to provide necessary guns, amunition ,uniforms ,and most of all shoes. The South had only 8500 miles of railroad compared to the North's 21000 miles connecting all of its major and important cities, enabling the North to quickly and easily move supplies and soldiers around. The South had only around nine million people while 3 million were slaves. They needed more to be able to fight in the armies and they were greatly outnumbered by the Union Army.