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Office of Strategic Services OSS

ESOficina de Servicios Estratégicos
The World War II intelligence and special operations agency that ran espionage and sabotage behind enemy lines and was the forerunner of the CIA
Dissolved Abolished October 1, 1945. Functions divided between the State and War Departments, later the basis for the CIA.

Before World War II the United States had no central intelligence service. In July 1941 President Franklin Roosevelt created the office of the Coordinator of Information, led by the lawyer and World War I hero William Donovan, and after Pearl Harbor it was reorganized as the Office of Strategic Services by a military order of June 13, 1942, under the Joint Chiefs of Staff. At its peak it had about 13,000 personnel, including soldiers, scholars, lawyers, and many women.

The OSS gathered intelligence through spies and research analysts, conducted sabotage and guerrilla operations behind enemy lines, supported resistance movements in occupied Europe and Asia, and ran propaganda and deception campaigns. Its Jedburgh teams parachuted into France before and after D-Day, its agents operated in Switzerland, North Africa, Yugoslavia, Burma, and China, and its Research and Analysis Branch pioneered the use of academic experts to study enemy economies and societies. It worked closely with British intelligence, which helped train it.

Fearing a peacetime secret police and facing rivalry from the military services and the FBI, President Harry Truman abolished the OSS by an executive order effective October 1, 1945, dividing its functions between the State and War Departments. Within months the need for coordinated intelligence led to the Central Intelligence Group in 1946 and then the Central Intelligence Agency under the National Security Act of 1947, staffed by many OSS veterans. Admirers credit the OSS with founding modern American intelligence and special operations, while historians also note its mixed wartime results and the questions it raised about secrecy in a democracy.

New Deal & the Administrative State · National Security State
Timeline
July 11, 1941
Coordinator of Information created
Roosevelt sets up the first central intelligence office.
June 13, 1942
OSS established
The agency is placed under the Joint Chiefs of Staff.
October 1, 1945
OSS abolished
Truman's order divides its functions between State and War.
Profile
StatusDissolved
AbbreviationOSS
Led by Director
Legal basisMilitary order of June 13, 1942, Executive Order 9621 (1945)
Key Facts
Created June 13, 1942
Predecessor Coordinator of Information (July 1941)
Reported to Joint Chiefs of Staff
Peak personnel About 13,000
Abolished October 1, 1945
Legacy Forerunner of the CIA and U.S. special operations forces
At a Glance
Date Created June 13, 1942, abolished October 1, 1945
Location Navy Hill, 2430 E Street NW, Washington, D.C.
Facts last checked October 24, 2026. Report a correction