Operating from December 1863 to July 1865, the Rock Island Prison Barracks was one of the largest Union military prisons during the American Civil War. Located on an island in the Mississippi River between Davenport, Iowa, and Moline, Illinois—now home to the Rock Island Arsenal—the facility held over 12,000 Confederate prisoners. While post-war polemics occasionally dubbed it the "Andersonville of the North," historical records present a far more complex picture of daily survival, severe disease outbreaks, and the logistical challenges of managing a massive wartime camp.
Understanding what life looked like inside this notorious Midwestern stockade requires looking past sensationalized myths. We have to examine official records, inmate diaries, and structural realities to grasp how prisoners lived, worked, and died along the Mississippi.
Establishment and Layout of the Stockade
The U.S. War Department authorized the construction of the prison in the summer of 1863 following the cessation of regular prisoner exchanges and the influx of captures after Gettysburg. Engineers designed the compound to hold thousands of men safely away from active conflict zones.
Enclosed by a 12-foot-high plank fence complete with guard towers and an outer patrol platform, the 12-acre compound eventually featured 84 prisoner barracks.
- The Barracks: Each building measured roughly 100 feet long, 22 feet wide, and 12 feet high, featuring built-in kitchens and rows of double bunks designed to house around 120 men.
- Support Infrastructure: Over time, auxiliary structures were added, including a prison hospital, a dispensary, a dead house, a guardhouse, and laundry facilities.
- Utilities: Water was drawn directly from the Mississippi River, and coal was supplied for heating stoves during harsh Midwestern winters.
The Daily Routine and Inmate Survival
Life inside the stockade was governed by rigid military schedules, roll calls, and inspections. For many enlisted men and officers, the days blended into a monotonous routine interrupted by cold weather, sickness, and the psychological weight of captivity.
Prisoners spent significant portions of the day managing basic survival tasks. Rations were modeled on standard army allowances, though supply lines fluctuated based on weather and military priorities. To combat extreme boredom and earn modest amounts of cash, many inmates turned to handicraft. Men carved bone, wood, and gutta-percha into rings, trinkets, and pipes, trading them with local merchants or guards who brought outside goods into the camp.
Intellectual and social life also emerged within the confines. Inmates formed informal debate societies, reading groups, and social clubs. Those who received letters or books from sympathetic relatives outside shared them widely.
Epidemics and the Toll of Disease
Despite efforts by camp commanders to maintain order, the most devastating enemy inside the barracks wasn't human hostility—it was disease. Shortly after the first prisoners arrived in December 1863, a severe smallpox epidemic struck the unacclimated population.
Sub-zero Midwestern temperatures, damp drafts whistling through green lumber walls, and crowded sleeping quarters compounded the crisis. Nearly one-third of all total fatalities occurred during the first three brutal months. Out of the roughly 12,192 men who passed through the gates, nearly 2,000 died—amounting to a mortality rate of approximately 16 percent. The vast majority of these deaths stemmed from smallpox, pneumonia, and dysentery rather than direct violence or intentional deprivation.
Medical staff worked out of the camp dispensary, but medical treatments in the 1860s were ill-equipped to handle epidemic-scale contagion. Deceased prisoners were transferred to the dead house and buried in a designated plot that is today preserved as the Rock Island Confederate Cemetery.
Taking the Oath and Enlistment
As the war dragged on into 1864, a distinct pathway out of captivity opened for Confederate inmates. The U.S. government permitted prisoners to take an oath of allegiance to the United States and enlist in the Union Army, often serving on the western frontier against hostile Native American tribes rather than fighting their former compatriots in the South.
Thousands of prisoners faced a difficult moral choice: remain in dismal camp conditions indefinitely awaiting a prisoner exchange that may never come, or swear allegiance to the Union and regain their freedom. Roughly a quarter of the inmates eventually chose to take the oath and enlist, altering the demographics of the camp significantly before its closure.
Frequently Asked Questions
When was the Rock Island Prison Barracks open?
The facility operated for roughly 20 months, opening in December 1863 and closing permanently in July 1865 following the conclusion of the Civil War.
How many prisoners died at Rock Island?
Out of more than 12,000 Confederate soldiers held at the camp, approximately 1,960 to 2,000 men died, primarily due to smallpox and winter illnesses rather than direct abuse.
What is left of the prison today?
None of the original prison barracks or stockade structures remain standing. The site was cleared, and the area is currently administered as part of the active U.S. Army installation, the Rock Island Arsenal. The historic Rock Island Confederate Cemetery remains preserved on the grounds.
How did prisoners pass the time inside the camp?
Inmates engaged in carving trinkets from bone and wood to sell to visitors, organized reading and debate clubs, and played games to cope with the psychological strain of prolonged confinement.
