Treatment of prisoners of war in the United States during the Civil War was often harsh, with prisons on both sides overcrowded, and with very few resources available. Food was scarce and thousands of people died.
This is Private Jackson O. Broshears of Company D, 65th Indiana Infantry, who fought on the Union side. He was a prisoner for a few months and was starved near to death.
The documentation of his case is dated the 19th of May, 1864.