 These were converted to the nuclear-capable Nike-Hercules missile in 1958.The Nike-Hercules system was deactivated throughout the US in 1972.From the late 1960s until at least 1978, Fort Tilden was an Army Reserve Post, housing a Signal Corps unit, the 411th Engineer Brigade, and an Army Reserve self-propelled 8" howitzer battalion, originally the 5/51st Field Artillery (FA) and renamed in the early 70's the 7/9th FA.