Sir Francis Drake, Captain Cook, and Henry Morgan all used Taboga and Perico as refuges, after raiding Spanish galleons.
As the work progressed, the dump was backfilled to create a large breakwater, which was later extended to the nearest of the offshore islands, Naos.
Amador was the primary infantry and support area, and grew to include a rather prominent "tank farm" for fuel storage.
To supply them, the causeway was extended to connect from Naos to the other nearby islands, Culebra, Perico, and Flamenco, all of which had batteries of various sizes.
Grant also included the nearby unconnected islands of San Jose, Panamarca, Changarmi, Tortolita, Torola, Taboga, Cocovieceta, Cocovi, and Venado.