Fort Delaware

Fort Delaware is the fortress that became a prison by accident of geography. The five-pointed granite bastion on Pea Patch Island — built 1846–1868 on a mud bank that legend says got its name from a wrecked ship's spilled peas — was designed to defend Wilmington and Philadelphia. When the Civil War came, the moated island in the Delaware River was simply too secure not to fill: nearly 13,000 Confederate prisoners at once after Gettysburg, about 33,000 over the war's course.

The prison's ledger is the file's dark spine — roughly 2,500 men died in the camp, buried across the river at Finn's Point National Cemetery, with accounts of 'General Terror' Schoepf's regime: putrefied water, starvation rations, scurvy and smallpox, sergeants throwing rats into crowds of prisoners to watch them fight for the meat. The island that was supposed to keep enemies out kept them in — the water defense worked on the prisoners the way it was meant to work on a fleet.

The fort returned to harbor defense through both world wars, was surplused in 1945, and became a state park in 1951 — ferry-only access, herons on the moat, and a haunting register thick enough to make it Delaware's most-reputed haunted site: the photographed 'blue man,' children in the officers' quarters, footsteps and shadows in the casemates where thousands of men once waited out a war they weren't fighting anymore.

Fort Delaware is the archive's island-prison file — the granite bastion on Pea Patch Island that held 33,000 Confederate prisoners, buried 2,500 across the river, and keeps its ghosts in the casemates of a fort that never fired in anger.