Morris Island (vicinity), South Carolina. The “Marsh Battery” or “Swamp Angel” after the explosion. On the early morning of August 22, 1863, the Union Parrott cannon known as the “Swamp Angel” (which weighed nearly 17,000 pounds) started firing on the City of Charleston, S.C. The following morning the “Swamp Angel” exploded.
The opening bombardment launched from the treacherous mudflats of Morris Island on August 22nd was a brutal milestone in the history of artillery warfare, representing a dramatic shift toward the terrifying realities of long-range total war. Engineered by Union industrialist Robert Parrott, the massive, 16,700-pound rifled cannon was meticulously mounted atop an innovative wooden pile foundation driven deep into a quagmire of coastal marshland, an extraordinary logistical feat that contemporary engineers had declared completely impossible. Operating at an unprecedented distance of nearly five miles from its target, the heavy gun began systematically hurling incendiary shells filled with highly volatile Greek fire directly into the symbolic cradle of the secessionist movement.
The sudden, high-stakes bombardment unleashed an immediate wave of psychological panic across Charleston, forcing civilian populations to frantically evacuate the historic harbor districts as fires broke out along the cobblestone streets. Confederate commanders fiercely condemned the shelling as an unmitigated violation of civilized warfare, while Union forces utilized the massive gun to demonstrate that no southern stronghold was safe from federal industrial power. The dramatic experiment came to a sudden, catastrophic halt the very next morning when the cannon’s iron breech violently burst under the immense pressure of its thirty-sixth discharge, leaving the shattered, mud-splattered barrel to stand as a permanent, somber monument to the destructive mechanics of the sectional conflict.
Image: The shattered remains of the 16,700-pound Union Parrott cannon, the “Swamp Angel,” resting in the Morris Island mud following its catastrophic breech explosion via LOC, no known restrictions
