Why would it be harder to supply Union troops as they moved farther south

This question is incomplete, here´s the complete question.

Read the article "North vs. South: Strengths and Weaknesses".

Why would it be harder to supply Union troops as they moved farther south?

The farther into the South the Union troops got made it more difficult to supply them because of the long-distance from their homes.

Explanation:

Furthermore, unlike the north, the south´s troops had the advantage of fighting in their own land, which they knew well, and had better-trained soldiers and experience with guns and horses.

the cost of college has risen faster than inflation for many years.

the high price of student services and administration are two reasons for the rapid increase in cost.

he did it to save us from our sins, so we can see him in heaven 1 day. it's because he loves us so much. he used himself as the final sacrifice, so that we could be forgiven for our sins, so that we can see him in heaven, if we believe.