description Fort Mifflin Overview
Fort Mifflin is an eighteenth-century fortification on Mud Island in the Delaware River near Philadelphia, Pennsylvania. Built to control access to the river and the port, it played a major role in the American Revolutionary War when its garrison resisted a British siege in the autumn of 1777. The defense delayed British efforts to supply forces farther upriver and contributed to the protection of Philadelphia's river approaches. The surviving fort is preserved as a historic site.
help Fort Mifflin FAQ
Where is Fort Mifflin?
Fort Mifflin is on Mud Island in the Delaware River near Philadelphia, Pennsylvania. It was built to control access to the river and port.
What happened at Fort Mifflin during the American Revolution?
Its garrison resisted a British siege during the American Revolutionary War. The fort's position helped protect access to Philadelphia through the Delaware River.
When was Fort Mifflin built?
Fort Mifflin is an eighteenth-century fortification. Its main purpose was to control river traffic approaching Philadelphia.
Why was Fort Mifflin built on Mud Island?
The island location allowed the fort to command access along the Delaware River. That position made it important for defending the nearby port of Philadelphia.
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