Answer:
1. Transportation system
2. Blockade of southern ports
3. Union Troops
4. Food shortages
Explanation:
According to historical records, during the American Civil war which occurred between the year 1862 to 1865, we have the following issues that happened to the Confederates soldiers.
Therefore, By the end of 1862, the collapse of the South's "TRANSPORTATION SYSTEM, the BLOCKADE OF SOUTHERN PORTS, and the presence of UNION TROOPS led to severe FOOD SHORTAGES.