In 1910 the two five-inch guns of Battery Gregg were transferred to Fort Ruger, Hawaii, and in 1918 the similar guns of Battery Krayenbuhl were removed for potential service as field guns on the Western Front.
During 1910, the two five-inch cannons of Battery Gregg were relocated to Fort Ruger, Hawaii. By 1918, the same caliber guns from Battery Krayenbuhl were removed and potentially deployed as field artillery in Europe.