John L. Magruder (June 3, 1887 – April 30, 1958) was a Brigadier general in the U.S. Army. Among his offices was that of Deputy Director for Intelligence for the Office of Strategic Services.

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John Magruder
Director of the Strategic Services Unit
In office October 1, 1945 – April 3, 1946
President	Harry Truman
Preceded by	William Donovan (Office of Strategic Services)
Succeeded by	William W. Quinn
Personal details
Born	(1887-06-03)June 3, 1887 Woodstock, Virginia, U.S.
Died	April 30, 1958(1958-04-30) (aged 70) Washington, D.C., U.S.
Resting place	Arlington National Cemetery
Education	Virginia Military Institute (BA)
Military service
Allegiance	United States
Branch/service	United States Army
Years of service	1910–1946
Rank	Brigadier General
Battles/wars	World War I World War II
Awards	Army Distinguished Service Medal

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John Magruder was born on June 3, 1887, in Woodstock, Virginia. He attended Virginia Military Institute and graduated in 1909. He was commissioned a second lieutenant in infantry in 1910. He was transferred to the field artillery branch of the army in the next year.

During World War I, Magruder served with the 112th Field Artillery within the American Expeditionary Forces in France.

After the war Magruder was transferred to China, where he was appointed an assistant military attaché in Beijing. He served in this capacity until 1924, when he was assigned for study at Command and General Staff College at Fort Leavenworth, Kansas. After his graduation, Magruder was transferred back to Beijing, now in the new capacity of military attaché.

During World War II Magruder served in the Office of Strategic Services (OSS), as deputy director under the leadership of General William J. Donovan. After the war, the OSS was disbanded. Core elements of it, however, were maintained in the new Strategic Services Unit (SSU), located in the then Department of War. This newly formed SSU was led by General Magruder.^[1][2][3][4] Magruder played a formative role in the creation of the civilian Central Intelligence Agency (CIA) in 1947,^[5] which absorbed the SSU.