Evidence: Fort Mifflin

Fort Mifflin, situated on Mud Island in the Delaware River near Philadelphia, Pennsylvania, is a historic military fort with a storied past. Construction of the fort began in 1771, and it played a crucial role in the American Revolutionary War.

During the Revolutionary War, Fort Mifflin gained prominence for its strategic location, guarding the water approach to Philadelphia. In 1777, British forces laid siege to the fort in an attempt to control the Delaware River and cut off supplies to General George Washington’s army. Despite facing harsh conditions and relentless bombardment, the American defenders, under the command of Colonel Samuel Smith, held out for several weeks, buying valuable time for Washington’s troops.

The prolonged resistance at Fort Mifflin contributed to the success of Washington’s army in the Battles of Saratoga, a turning point in the war. The British eventually captured the fort in November 1777, but its defiant stand had a lasting impact on the course of the conflict.

Fort Mifflin continued to serve a military function in the 19th century, playing roles in the Civil War and the Spanish-American War. Over time, its military significance diminished, and the fort transitioned into a historic site.

Today, Fort Mifflin is a preserved historical landmark open to the public. Visitors can explore the well-preserved structures, including barracks, casemates, and the iconic chevaux de frise (a defensive obstacle), while learning about the fort’s role in American history. The site offers educational programs, guided tours, and living history events, providing a glimpse into the challenges faced by those who defended this crucial outpost during pivotal moments in American history.


Fort Mifflin, Philadelphia, Pennsylvania


Just after the investigator says “Shut the light off” you can hear what sounds like a scream and then again around the 5 second mark.

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