The 308th Cavalry Regiment, commonly referred to as the 308th Cavalry, was a reserve regiment of the United States Army from 1917 until 1942. In September 1918, it was converted into the 65th and 66th Field Artillery, and the 22d Trench Mortar Battery. The units were stationed at Camp Kearny, California. Although demobilized in December 1918, they were re-formed and re-purposed in October 1921 as the 308th Cavalry, an element of the 62d Cavalry Division. During World War II, it was disbanded again. In 1959, the regimental headquarters was transferred to Department of the Army control. World War I The 308th Cavalry was constituted on 18 May 1917, in the National Army and organized on 24 February 1918, at Camp Harry J. Jones, Arizona. The regiment was broken up on 13 September and its men were used to create the 65th and 66th Field Artillery, and the 22d Trench Mortar Battery. The two field artillery regiments were demobilized at Camp Kearny, California, on 22 December preceded by the trench mortar battery on the previous day. Inter-war years The 65th and 66th Field Artillery, and the 22d Trench Mortar Battery were reconstituted on 15 October 1921, in the Organized Reserves (present-day Army Reserve) as the 308th Cavalry, an element of the 62d Cavalry Division. The regiment was re-formed for the second time on 10 November 1921, with its headquarters at Cumberland, Maryland, but transferred to western Pennsylvania around October 1922, relocating its headquarters to Pittsburgh in 1923. In 1928, members of the regiment built the 308th Cavalry Club in Aspinwall on land owned by the local hospital, with equestrian, pistol, and saber training areas, as a site for inactive training. In July of that year, the regiment conducted its annual summer training with the 52d Cavalry Brigade at Mount Gretna. On 1 July 1929, the 308th Cavalry was reorganized to consist of three squadrons. Simultaneously, all of its units were moved to Pittsburgh. The regiment usually held its Inactive Training Period meetings at the 107th Field Artillery's Hunt Armory or at the city's Post Office Building, and used the horses of the 107th for regular equestrian training. It conducted summer training at Fort Myer and Fort Belvoir with the 3d Cavalry. As an alternate form of training, the 308th Cavalry provided basic military instruction to civilians under the Citizens' Military Training Camp program at Fort Myer. Its designated mobilization training station