Bomb-Proof Quarters in Fort Sedgwick in Front of Petersburg, Va. (U.S. Civil War) The title refers to bomb-proof quarters or fortified shelters located within Fort Sedgwick, a Union Army fortification strategically positioned in front of the Confederate city of Petersburg, Virginia, during the American Civil War. These structures were designed and built to provide protection from enemy artillery fire and mortar attacks, offering soldiers a relatively safe space amidst the constant bombardment that characterized trench warfare during this period. Although not extensively detailed in historical records, these bomb-proof quarters would have been essential for the Union Army's survival and offensive operations against Petersburg and its surrounding Confederate defenses. The presence of such structures within Fort Sedgwick underscores the importance of engineering innovation and resourcefulness in military strategy during the U.S. Civil War.