Moved to Camp Eustis, Virginia later that month; demobilized there in December 1918.

These included Battery F, 52nd Coast Artillery (CA) Regiment and Batteries B, G, and H (searchlight) of the 53rd Coast Artillery Regiment; the latter three had been redesignated from components of the 57th CA in July 1941.

On 1 August 1943 the identifier "6-inch gun" was added to the battalion's designation, as the primary batteries (construction nos.

[4] The 27th CA Battalion was inactivated at the Royal Bermuda Yacht Club on 1 June 1944.

[2][5] Typically, as US coast artillery units were demobilized late in the war, their assets would be transferred to their parent harbor defense command, in this case the Harbor Defenses of Bermuda.