Activated 15 Oct 1940•  Entered Combat 21 Nov 1943  •  Days of Combat 110  •  Casualties 6,533


Commanding Generals

Maj. Gen. William Haskell   (Oct 40 - Oct 41) 
Brig. Gen. Ralph McT. Pennell   (Nov 41 - Oct 42) 
Maj. Gen. Ralph C. Smith   (Nov 42 - May 44) 
Maj. Gen. George W. Griner, Jr.   (Jun 44 - Dec 45)



Central Pacific (7 Dec 41 - 6 Dec 43)

Western Pacific (15 Jun 44 - 2 Sep 45)

Ryukyus (26 Mar 45 - 2 Jul 45)

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The 27th Infantry Division arrived in Hawaii, 21 May 1942, to defend the outer islands from amphibious attack. Elements of the Division first saw action in the attack and capture of Makin Atoll in the Gilbert Islands, 21 to 24 November 1943. One battalion of the 106th Regiment participated in the attack on Eniwetok Atoll, 19-26 February 1944, returning to Oahu in March. During this mission, one battalion landed unopposed on Majuro Island, 1 February, and completed its seizure, 3 February. The Division began preparations for the Marianas operations, 15 March. On D-day plus 1, 16 June 1944, elements landed at night on Saipan to support the Second and Fourth Marines. A bridgehead was established and Aslito Airfield captured, 18 June. Fighting continued throughout June. During a pitched battle, 7 July, Japanese overran elements of the Division in a banzai attack, but organized resistance was crushed the next day. During the months of July and August, the 27th cleaned out isolated pockets in the mountains and cliffs of Saipan. Beginning in the middle of August, the Division moved to the New Hebrides for rest and rehabilitation. On 25 March 1945, the 27th sailed from Espiritu Santo, arriving at Okinawa, 9 April 1945. The Division participated in the XXIV Corps general attack, 19 April 1945, securing a dominating ridge line south of Machinato and Kakazu. Machinato Airfield was captured, 28 April, after a severe struggle. On 1 May, the Division was relieved by the 1st Marine Division and attached to the Island Command for garrison duty. Tori Shima was seized, 12 May, without opposition. The 27th attacked from the south end of Ishikawa Isthmus to sweep the northern sector of Okinawa. The enemy fought bitterly on Onnatake Hill from 23 May until 2 June, before losing the strong point. After a mopping-up period, the Division left Okinawa, 7 September 1945, moved to Japan and occupied Niigata and Fukushima Prefectures.

Notes and sources:
Date Activated is the date the division was activated or inducted into federal service (national guard units).
Casualties are number of killed, wounded in action, captured, and missing.
The dates after the campaign name are the dates of the campaign not of the division.
The Army Almanac: A Book of Facts Concerning the Army of the United States; , U.S. Government Printing Office. Army Battle Casualties and Nonbattle Deaths in World War II, Final Report, 1 December 1941 - 31 December 1946. US Army Center of Military History at http://www.history.army.mil/ Various divisional histories