Fort Independence This is an aerial view of Fort Independence in Boston Harbor circa 1935. Note the similar shape of the fort to the Spanish-American V Corps badge displayed on the Regiment’s coat of arms. Fort Independence as seen from South Boston. The Fort is located on Castle Island. Today it is accessible by road. Another view of the fort’s south side battlements. The main sally port entrance to the fort. A close up view of the sally port When the Regiment’s officers bgan forming in Boston in May 1861, the fort was still occupied by the troops of the 13th Massachsetts Infantry seen here. Interior of the fort. Note the sign of the 13th Massachsetts Infantry. Another interior view. The symbols are various Union Army corps badges with the Fifth Corps in the middle. Part of the Regiment’s duties at Fort Independence was to protect the coast defense batteries located there. An 11th US Infantry recruiting advertisement from an Indianapolis newspaper in 1862. An 11th US Infantry recruiting poster from 1863.