World War I
Activated: 18 July 1917 (National Guard Division from California, Nevada, and Utah).
Overseas: 3 August 1918 and redesignated the 6th Depot Division; received, equipped, trained, and forwarded replacements.
Maj. Gen. F. S. Strong (25 August 1917)
Brig. Gen. G. H. Cameron (18 September 1917)
Brig. Gen. L. S. Lyon (19 November 1917)
Brig. Gen. G. H. Cameron (23 November 1917)
Brig. Gen. L. S. Lyon (6 December 1917)
Maj. Gen. F. S. Strong (8 December 1917).
Returned to U. S.: 30 June 1919.
World War II
Activated: 3 March 1941 (National Guard Division from California and Utah).
Overseas: 23 August 1942.
Campaigns: Bismarck Archipelago, Southern Philippines, Luzon.
Distinguished Unit Citations: 3.
Awards: MH-1 ; DSC-12 ; DSM-1 ; SS-245; LM-21; SM-30 ; BSM-1,036 ; AM-57.
Maj. Gen. Walter P. Story (March-September 1941)
Maj. Gen. Ernest J. Dawley (September 1941-April 1942)
Maj. Gen. Rapp Brush (April 1942-July 1945)
Brig. Gen. Donald J. Myers (July 1945 to inactivation).
Returned to U. S.: 7 April 1946.
Inactivated: 7 April 1946 (See National Guard).
The 40th Infantry Division's first oversea assignment was the defense of outer islands of Hawaii, where it arrived in September 1942. Training continued as defensive positions were improved and maintained. In July 1943 the Division was concentrated on Oahu, and relieved the 24th of the defense of the North Sec-
tor. Relieved of the North Sector in October 1943, the 40th entered upon a period of intensive amphibious and jungle training. On 20 December 1943, the first units left for Guadalcanal, and by mid-January 1944, movement was completed, and the Division prepared for its first combat assignment. On 24 April 1944, it left Guadalcanal for New Britain. The Regiments of the Division took positions at Talasea on the northern side of the island, at Arawe on the southern side, and at Gape Gloucester near the western end. Neutralization of the enemy was effected by patrols. No major battle was fought. Heavy rain and mud were constant problems. The 40th was relieved of missions on New Britain, 27 November, and began training for the Luzon landing. Sailing from Borgen Bay, 9 December 1944, the Division made an assault landing at Lingayen, Luzon, under command of XIV Corps, on 9 January 1945. Seizing Lingayen airfield, the Division occupied Bolinao Peninsula and San Miguel, and advanced toward Manila, running into heavy fighting in the Fort Stotsenburg area and the Bambam Hills. Snake Hill and Storm King Mountain were taken in February and the 40th was relieved, 2 March. Leaving Luzon, 15 March, 1945, to cut behind the Japanese, the Division landed on Panay Island on the 18th and knocked out Japanese resistance within 10 days, seizing airfields at Santa Barbara and Mandurriao. On 29 March, it landed at Pulupandan, Negros, advanced through Bacolod toward Talisay, which it secured by 2 April 1945. After mopping up on Negros Island, the Division returned to Panay in June and July 1945. In September 1945, the Division moved to Korea for occupation duty.
Nickname: Sunshine Division. Shoulder patch: A dark blue diamond on which, in yellow, is the sun with 12 rays; the patch is worn diagonally. Association: 40th Infantry Division Association, California National Guard, 700 Exposition Boulevard, Los Angeles 37, Calif. Publication: History 40th Infantry Division; by unit members; Army & Navy Publishing Co., Baton Rouge 1, La., 1947.
[Nota Bene: These combat chronicles, current as of October 1948, are reproduced from The Army Almanac: A Book of Facts Concerning the Army of the United States, U.S. Government Printing Office, 1950, pp. 510-592.]