Frankford Arsenal is a historic military facility located in Philadelphia, Pennsylvania. Established in 1816, it was primarily used for the production and testing of ammunition and ordnance for the United States Army. Over the years, it played a significant role in various conflicts, including the Civil War and both World Wars. The arsenal was known for its innovative manufacturing techniques and contributions to military logistics. It operated until 1977, after which the site was repurposed for commercial and residential development. Today, remnants of its history can still be seen in the surrounding area, reflecting its importance in American military history.