Of the 359,528 Union Army dead, amounting to 15 percent of the over two million who served:

• 110,070 were killed in action (67,000) or died of wounds (43,000).
• 199,790 died of disease (75 percent was due to the war, the remainder would have occurred in civilian life anyway)
• 24,866 died in Confederate prison camps
• 9,058 were killed by accidents or drowning
• 15,741 other/unknown deaths