It’s 1777 and The Siege of Fort Mifflin is at hand. British supply ships are on the Delaware River trying to deliver much needed supplies to their army who have taken over Philadelphia. Fort Mifflin is one of the three forts in charge of stopping these ships. The British Navy are firing one thousand cannon balls every hour at this weakening fort. This building, The Commandant's House also served as a Citadel or fort within a fort. This was the last line of defense against the most powerful navy of the era.