During that time, Fort Berkeley was significantly expanded and upgraded, as it guarded the western entrance to English Harbour.

[3][4] In 1745, a new battery was built across from Fort Berkeley, to guard the eastern entrance to English Harbour.

[1] Originally, the fort was called South East Point Battery, and consisted of two gun platforms, a guard house, a kitchen, and latrines.

[1] In 1781, Thomas Shirley, recently appointed Governor of the Leeward Islands, urged the local government to fortify the area around and above English Harbour to better protect the Naval Dockyard.

[5][6][7] As part of this defense upgrade, a larger gun platform was built above Horseshoe Battery, to function as a signal or communication station.