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| Recapture of Guam (1944) | |
|---|---|
| Conflict | Recapture of Guam (1944) |
| Partof | Pacific War, World War II |
| Date | 21 July – 10 August 1944 |
| Place | Guam, Marianas Islands, Pacific Ocean |
| Result | American victory; Territory of Guam recaptured from Empire of Japan |
| Combatant1 | United States, United States Navy, United States Marine Corps, United States Army |
| Combatant2 | Empire of Japan, Imperial Japanese Army, Imperial Japanese Navy |
| Commander1 | Thomas C. Kinkaid, Roy S. Geiger, Holland M. Smith, Ralph C. Smith, Charles D. Barrett |
| Commander2 | Hideyoshi Obata, Tadamichi Kuribayashi, Sadayoshi Yamada |
| Strength1 | ~60,000 (USMC 3rd Marine Division, US Army 77th Infantry Division, naval and air units) |
| Strength2 | ~19,000 (Imperial Japanese Army 29th Division, Guam naval garrison) |
| Casualties1 | ~1,700 killed or missing, ~6,000 wounded |
| Casualties2 | ~18,000 killed, many captured or missing |
Recapture of Guam (1944) The Recapture of Guam (1944) was a major amphibious and ground operation by United States forces to seize the island of Guam from the Empire of Japan during the Pacific War phase of World War II. Executed between 21 July and 10 August 1944, the operation involved coordination among the United States Navy, United States Marine Corps, and United States Army and formed part of the larger Marianas campaign, supporting operations such as Battle of Saipan and the Battle of Tinian.
By mid-1944 the United States Pacific Fleet, under Admiral Chester W. Nimitz as Commander in Chief, Pacific Ocean Areas, had achieved strategic initiative following victories at Battle of Midway and the Gilbert and Marshall Islands campaign. The Marianas campaign aimed to secure bases for B-29 Superfortress operations and to cut Japanese lines of communication linking Palau Islands and the Philippine archipelago. Guam had been captured by the Empire of Japan in December 1941 during the Japanese invasion of Guam and became a fortified outpost under the Imperial Japanese Army 29th Division. American planners, including Admiral William F. Halsey Jr. and General Douglas MacArthur's contemporaries, sought to retake Guam in concert with landings on Saipan and Tinian to provide staging areas for future operations such as the Philippine campaign (1944–45).
Guam's deep harbors and central location in the Marianas Islands made it vital for naval logistics supporting the United States Pacific Fleet and for airfields for Army Air Forces strategic bombing. Control of Guam would enable Twentieth Air Force B-29 Superfortress launches against the Home islands and deny the Imperial Japanese Navy forward bases. Retaking Guam also had political symbolism for the United States as it restored American sovereignty over the Territory of Guam, initially acquired following the Spanish–American War under the Treaty of Paris (1898) and lost in 1941. The operation thus intersected with objectives pursued at the Guadalcanal campaign, Solomon Islands campaign, and the forthcoming Philippine Sea engagements.
Planning was led by Admiral Raymond A. Spruance's staff in coordination with Commander, Mariana Islands Operations and ground commanders including Lieutenant General Holland M. Smith. Amphibious doctrine gleaned from Guadalcanal and Tarawa informed rehearsals conducted at Eniwetok Atoll and staging at Pearl Harbor. Naval bombardment was arranged under Task Force 58 command, with carriers providing air cover from elements of the Fast Carrier Task Force and battleships such as USS Tennessee (BB-43) and USS Pennsylvania (BB-38) assigned to pre-invasion fire missions. Intelligence units from Office of Strategic Services and Naval Intelligence assessed Japanese fortifications, while engineering units prepared landing craft including LCVPs and LSTs. Logistics involved the Service Force, Pacific Fleet and the Military Sea Transportation Service predecessor, coordinating ammunition, fuel, and medical support.
On 21 July 1944 amphibious forces from Operation Forager executed simultaneous landings on Guam's western beaches near Agat and Asan with the 3rd Marine Division assaulting one sector and units of the 77th Infantry Division and attached Marines securing others. Preceded by a heavy naval and carrier air bombardment, Marines and soldiers landed from amphibious tractors under hostile fire from entrenched positions manned by the Imperial Japanese Army. Close air support from carrier groups including USS Enterprise (CV-6) and USS Lexington (CV-16) suppressed defensive strongpoints. Commanders such as Lieutenant General Roy S. Geiger and Major General Allen H. Turnage directed combined-arms assaults to consolidate the beachhead amidst shore defenses and counterattacks reminiscent of lessons from Battle of Tarawa.
After the beachhead was secured American forces advanced inland against well-prepared defensive lines, caves, and fortified ridges in terrain like the Nimitz Hill and Mount Alifan areas. Japanese defenders, following orders from commanders including Lieutenant General Hideyoshi Obata, executed tenacious counterattacks and guerrilla-style resistance, utilizing cave complexes similar to those encountered on Iwo Jima and employing heavy machine guns, artillery pieces, and mortars. American units cleared positions through coordinated artillery fire from units such as the 194th Field Artillery Battalion, flamethrower teams, and demolition squads, supported by engineers and tank units like M4 Sherman contingents. The battle involved urban fighting in population centers and difficult jungle engagements, culminating in the destruction of organized Japanese resistance by early August after battles around Mount Alifan and the Asan River.
By 10 August organized Japanese resistance on Guam had largely ceased, though sporadic holdouts and isolated skirmishes continued. American casualties numbered in the thousands, with estimates of killed, wounded, and missing among the 3rd Marine Division and 77th Infantry Division; Japanese casualties were higher, with most of the garrison killed or captured. The recapture enabled rapid construction of airfields such as North Field (Guam) and logistical bases supporting Operation Forager follow-on actions and the Philippine liberation. Post-battle occupation involved civil affairs units re-establishing American administration and repatriation efforts for liberated prisoners and civilian evacuees.
The recapture of Guam reshaped the strategic map of the Pacific Theater and facilitated long-range bombing of the Empire of Japan, contributing to subsequent operations including the Battle of the Philippine Sea and the Okinawa campaign. The battle is commemorated on Guam through monuments, memorials, and preserved sites such as the Guam Museum exhibits and battlefield markers honoring units like the 3rd Marine Division and the 77th Infantry Division. Annual observances, veterans' reunions, and inclusion in histories by institutions like the National World War II Museum and archival collections at the National Archives and Records Administration preserve operational records and personal histories of sailors, Marines, soldiers, and Guam residents affected by the campaign. The operation remains a studied case in amphibious warfare in curricula at schools like the United States Naval War College and the United States Army Command and General Staff College.
Category:Battles of World War II involving the United States Category:1944 in Guam