World War One
The First Army was established on 10 August 1918 as a field army when sufficient American military manpower had arrived on the Western Front during the final months of World War I.
The large number of troops assigned to the American Expeditionary Forces (AEF) required the activation of subordinate commands. To fill this need, First Army was the first of three field armies established under the AEF. The first commander was General John J. Pershing, who also served as Commander-in-Chief of the AEF.
The headquarters planned and directed the first major American offensive, the St Mihiel Offensive (September 12 to 16, 1918). It later went on to fight in the largest and d
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eadliest battle in the United States Army's history, the Meuse–Argonne offensive.
Serving in its ranks throughout World War I were many figures who later played important roles in World War II. First Army, now under Lieutenant General Hunter Liggett, was inactivated on April 20th, 1919, five months after the Armistice with Germany which ended hostilities.
The First Army was established on 10 August 1918 as a field army when sufficient American military manpower had arrived on the Western Front during the final months of World War I. The large number of troops assigned to the American Expeditionary Forces (AEF) required the activation of subordinate commands. To fill this need, First Army was the first of three field armies established under the AEF.
The first commander was General John J. Pershing, who also served as Commander-in-Chief of the AEF. The headquarters planned and directed the first major American offensive, the St Mihiel Offensive (September 12 to 16, 1918). It later went on to fight in the largest and deadliest battle in the United States Army's history, the Meuse–Argonne offensive. Serving in its ranks throughout World War I were many figures who later played important roles in World War II.
First Army, now under Lieutenant General Hunter Liggett, was inactivated on April 20th, 1919, five months after the Armistice with Germany which ended hostilities.