Colonel Fiser led the Seventeenth Mississippi Regiment in the attack on Fort Sanders, losing an arm from a point-blank Yankee pistol shot while trying to cut down the flag pole the Seventy-Ninth New York Cameron Highlanders had erected on the southwest side of the Northwest Bastion.

Fiser, who after the war changed the spelling of his name to Fizer (hence you see it spelled both ways in historical records), had already been wounded four times previously, including a cheek wound and two leg wounds at Gettysburg. He died young, in 1876, probably from complications of his wounds.