Fort Defiance was also being constructed at this time, located farther southwest, past Fort Box, near present-day Red Hook.[1] In addition to these new forts, a mounted battery was established on Governors Island, cannons were placed at Fort George facing Bowling Green, and more cannons were placed at the Whitehall Dock, which sat on the East River.[21] Hulks were sunk at strategic locations to deter the British from entering the East River and other waterways.[22]