Incomplete question. I inferred you are referring to the conditions in Andersonville prison after the Union Blockade.
Explanation:
Historical sources confirm that indeed the Union Blockade affected the supply of basic necessities in the city of Andersonville in the state of Georgia which was part of the Confederate States.
The main reason for the Union Blockade was to restrict the trading activities in the Confederate States. However, since Andersonville prison according to some sources had nearly 45,000 prisoners they were unable to buy food supplies to feed those in the prison; causing most to die of starvation.
