These stunning portraits put a human face on the US's most deadly war

The US Civil War was the most costly conflict that the country has ever faced.

The fighting was responsible for more American deaths than almost every other war the US has fought combined. And the financial cost of the conflict radically changed the entirety of the US economy with repercussions still being felt today.

The following photos, from the Library of Congress, highlight the individuals affected by the conflict with stunning images from that period of conflict.