Changes

Completed in [[1906]], '''Battery Cooper''' mounted two model 1903 6-inch guns on disappearing carriages. During World War I, the guns were removed for use on railway mounts in France. In 1937, four emplacements for 155mm guns were constructed around Battery Cooper and designated Battery GPF, remaining part of the Harbor Defense Project until the spring of April 1945 when it was disarmed.<ref name="NPS" />