Slain Confederate Artillerymen at Dunker Church Library of Congress Prints and Photographs Division Washington, D.C.(LC-DIG-cwpbh-03384) Historians can infer certain pieces of information about past events by looking at photographs. Which of the following can be inferred by looking at the Gardner photo of Antietam? Horse-drawn wagons were used for military purposes during the battle. No Confederate soldiers were killed during the battle No more than a dozen soldiers were killed during the battle. Seen as the first modern war," the Civil War wrought which of the following changes resulting in an extraordinarily high number of casualties? O Nineteenth century conceptions of humane treatment of war criminals Technological advances in weaponry O A shift from an industrial to agricultural economy