a reinforced concrete, World War I 12 inch coastal gun battery on Fort Barry, Marin County, California. The battery was named in G.O. 63, 12 May 1919, after Colonel Elmer J. Wallace, Coast Artillery Corps, who died 5 Nov 1918 at Somlly, France. Battery construction started in 1917, was completed in 1921 and transferred to the Coast Artillery for use 24 Jun 1921 at a cost of $273,464.41. The Battery was later casemated in 1942-1943 at a cost of $758,241.67 and re-transferred 16 Nov 1943. Deactivated in 1948. The military reservation land was turned over to the GGNRA in 1995 and the last military troops left Fort Barry in 2000.
