Concept

159th Infantry Regiment (United States)

Résumé
The 159th Infantry Regiment was an infantry regiment of the United States Army. It served as a part of the 40th Infantry Division for most of its history before deploying in World War II as a part of the 7th Infantry Division. The regiment traced its lineage to the 2nd Infantry Battalion of the California National Guard, organized on 12 December 1879 from existing companies. The 159th Infantry Regiment was first constituted and activated in the Regular Army in the 80th Infantry Brigade, 40th Infantry Division. It served with the division until 1942. On 1 July 1940, the 7th Infantry Division was reactivated at Camp Ord, California, under the command of Major General Joseph W. Stilwell. The 7th Infantry Division was assigned to III Corps of the Fourth United States Army, and that year it was sent to Oregon for tactical maneuvers. Division units also practiced boat loading at the Monterey Wharf and amphibious assault techniques at the Salinas River in California. With the Japanese attack of Pearl Harbor, the division was sent to Camp San Luis Obispo to continue its training as a combat division. The 53rd Infantry Regiment was removed from the 7th Division and replaced with the 159th Infantry Regiment, newly deployed from the California Army National Guard. For the early parts of the war, the division participated mainly in construction and training roles. On 9 April 1942, the division formally redesignated as the 7th Motorized Division. It began training in the Mojave Desert in preparation for deployment to the African theater. However, it was again designated the 7th Infantry Division on 1 January 1943, when the motorized equipment was removed from the unit and it became a light infantry division once more. It began rigorous amphibious assault training under Marines from the Fleet Marine Force, before being deployed to fight in the Pacific theater instead of Africa. General Holland Smith oversaw the unit's training. Elements of the 7th Infantry Division first saw combat in the amphibious assault on Attu Island, the westernmost Japanese entrenchment in the Aleutian islands chain.
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