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The First Army is the oldest and longest established field army of the United States Army. It now serves as a mobilization, readiness and training command.
First Army was established on 10 August 1918 as a field army when sufficient American military manpower had arrived in France during World War I. As an element of the American Expeditionary Forces (AEF) in the latter stages of World War I it was the first of three field armies established under the AEF. Serving in its ranks were many figures who later played important roles in World War II. First Army was inactivated in April 1919.
As part of an army reorganization and final realization of the 1920 amendment to the National Defense Act of 1916, Army Chief of Staff, General Douglas MacArthur directed the establishment of four field armies that each commanded three corps areas that were geographically located. The field armies were established to provide organizational structure for large military organizations that might be mobilized in time of national need.
First Army was located in the northeast United States and was activated on 11 September 1933 at paper organization in its early days, its staff was the existing staff of the corps areas. The overall mission of the First Army was commanding and training regular army, army reserve and national guard units in the three corps areas.
Nolan, the American Expeditionary Force's (AEF) chief of intelligence during World War I was followed by Major General George C. Marshall. Passed over as a candidate for Army Chief of Staff for Douglas MacArthur, Conner retired.
In 1938, First Army came under command of General Omar Bradley.
First Army's entry into World War II began in October 1943 as Bradley returned to Washington, D.C. to receive his command and began to assemble a staff and headquarters to prepare for Operation Overlord, the invasion of Normandy. Headquarters, First Army was activated In January 1944 at Bristol, England.
Upon going ashore on 6 June 1944, D-Day, First Army came under 21st Army Group and commanded all American ground forces during the invasion. Three American divisions were landed by sea at the Western end of the beaches, and two more were landed by air. On Utah Beach the assault troops made good time, but Omaha Beach came nearest of all of the five landing areas to disaster. The two American airborne divisions that landed were scattered all over the landscape, and caused considerable confusion amongst the German soldiers, as well as largely securing their objectives, albeit with units completely mixed up with each other. First Army captured much of the early gains of the Allied forces in Normandy. Once the beachheads were joined up, its troops struck west and isolated the Cotentin Peninsula, and then captured Cherbourg. When the American Mulberry harbour was wrecked by a storm, Cherbourg became much more vital than it had been thought it would be.
After the capture of Cherbourg, First Army struck south. In Operation Cobra, its forces finally managed to break through the German lines. The newly established Third Army was then fed through the gap and raced across France. The Army then passed from the control of 21st Army Group to the newly arrived 12th Army Group. First Army followed Third Army and helped to surround the Falaise pocket.
After capturing Paris (the "Wehrmachtbefehlshaber von Groß-Paris", Dietrich von Choltitz, capitulated 25 August, ignoring Hitler's "Trümmerfeldbefehl"),[1][2] First Army headed towards the south of the Netherlands.
When the Germans attacked during the Battle of the Bulge, First Army found itself on the north side of the salient, and thus isolated from 12th Army Group, its commanding authority. It was, therefore, transferred, along with Ninth Army, to 21st Army Group on 20 December.[3] The salient was reduced by early February 1945. Following the Battle of the Bulge, the Rhineland Campaign began, and First Army was transferred back to 12th Army Group. In Operation Lumberjack, First Army closed up to the lower Rhine by 5 March, and the higher parts of the river five days later.
On 7 March, in a stroke of luck, Company A, 27th Armored Infantry Battalion (AIB), part of Combat Command B, found the Ludendorff Bridge across the Rhine at Remagen was still standing. It quickly captured the bridge and established a secure bridgehead. in the next 15 days over 25,000 troops and their equipment crossed the river. By 4 April, an enormous pocket had been created by First Army and Ninth Army, which contained the German Army Group B under Field Marshal Model, the last significant combat force in the north west of Germany. Whilst some elements of First Army concentrated upon reducing the Ruhr pocket, others headed further east, creating another pocket containing the German Eleventh Army. First Army reached the Elbe by 18 April. There the advance halted, as that was the agreed demarcation zone between the American and Soviet forces. First Army and Soviet forces met on 25 April.
In May 1945, advance elements of First Army headquarters had returned to New York City and were preparing to redeploy to the Pacific theater of the war to prepare for Operation Coronet, the planned second phase of Operation Downfall the proposed invasion of Honshū, the main island of Japan in the spring of 1946, but the Japanese surrender in August 1945 thanks to the atomic bombings of Hiroshima and Nagasaki terminated that effort.
First Army returned to the United States in late 1945; first to Fort Jackson (South Carolina), then to Fort Bragg, North Carolina, returning to Fort Jay, Governors Island, New York in the spring of 1946. Twenty years later, in 1966, First Army relocated to Fort Meade, Maryland and took over the responsibilities of Second Army, which was inactivated. In 1973, First Army's mission changed from training and preparation of active units to Army Reserve units. In a 1993 reorganization, five divisions carried out that training and support mission:
In 1993, Headquarters First Army relocated to Hurricane Katrina disaster was a rare bright spot in leading federal relief efforts in the aftermath of the storm. Its commander, Russel L. Honoré, a Louisiana native, became a nationally recognized figure in his direct, no-nonsense approach to disaster relief which earned First Army a Joint Meritorious Unit Award.
In the 21st century, First Army was subjected to more changes as base closures and force structures were instituted to modernize, economize and change its mission. In 2005, a BRAC decision called for the relocation of First Army headquarters to Rock Island Arsenal, Illinois in 2011. Its former quarters at Fort Gillem was to transition to a single national location for the mobilization and demobilization of Army National Guard and Reserve units.
In a second change, as part of the 2006 Transformation of the United States Army program, First Army exchanged its civilian assistance mission for the training and support missions for military units in the western United States formerly held by US Fifth Army. Fifth Army then became U.S. Army, North with responsibilities for homeland defense and domestic emergency assistance.
First Army deactivated its training divisions, this is known as or standing down. The units where reactivated as separate training brigades under two commands. First Army Division West assuming Fifth Army's role and relocating from Fort Carson to its new headquarters at Fort Hood, Texas, oversees units in all states west of the Mississippi River.
First United States Army was redesignated as First Army on 3 October 2006.
First Army Division East – Fort Meade, Maryland[4]
First Army Division West – Fort Hood, Texas[5]
This article incorporates public domain material from websites or documents of the United States Army Center of Military History.
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