Fort Levett was a former U.S. Army fort built on Cushing Island, Maine, in 1898. Located in Cumberland County, Maine, in the middle of Casco Bay near Portland, Maine, the fort was heavily fortified with cannons for coastal defense. Built in the wake of the Spanish American War, Fort Levett was manned during both World Wars. Fort Levett was built on 140 acres (0.57 km²) of Cushing Island, and the coast artillery fortification was visited by several Secretaries of War, including Jacob M. Dickinson, Secretary of War in 1909. The fort, whose call letters were FV, was part of a network of forts guarding Portland Harbor and Casco Bay, which included Levett, Fort Williams on Portland Head, and Fort McKinley on Great Diamond Island as well as Fort Preble. Fort Scammel and Fort Gorges, once strongly fortified and guarding the harbor entrance, were decommissioned earlier than the previous three forts.