Answer:
The North could easily move soldiers and supplies.
Step-by-step explanation:
During the Civil, War Railroads were a major factor in 1861 the North had the majority of the tracks, about 22 thousand miles while the South had only 9 thousand miles of tracks.
This put the North in advantage, with the help of the railroads they could transport supplies and soldiers faster.
Also, the South did not pay much attention to the railroads, they believed that they could be used only to transport cotton to the ports.