Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Office of Strategic Services
Table of Contents
Introduction References & Edit History Quick Facts & Related Topics
For Students
Germany invades Poland, September 1, 1939, using 45 German divisions and aerial attack. By September 20, only Warsaw held out, but final surrender came on September 29.
Pop Quiz: 17 Things to Know About World War II
Related Questions
Read Next
Operation Barbarossa, German troops in Russia, 1941. Nazi German soldiers in action against the Red Army (Soviet Union) at an along the frontlines in the early days of the German invasion of the Soviet Union, 1941. World War II, WWII
75th Anniversary of Operation Barbarossa
People celebrate in Times Square in New York City, New York on V-E Day (Victory in Europe), May 8, 1945.
70th Anniversary of V-E Day
Landing craft (American) of World War II. Normandy invasion, WWII, D-Day, infographic. SPOTLIGHT VERSION.
Types of Landing Craft of World War II Infographic
Aerial view of Asakusa, Tokyo heavily damaged by the World War II March 1945 US fire bombing raids of Tokyo.Tokyo famous for the Senso-ji a Buddhist temple that survived the air raids. Allied firebombing of Tokyo 1945. Fire bomb Tokyo. WWII, World War II
Anniversary of the Tokyo Firebombing
Map/infographic of the Dunkirk Evacuation May 26-June 4, 1940. World War II. France. SPOTLIGHT VERSION.
Timeline of the Dunkirk Evacuation
Discover
Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics
10 Best Hockey Players of All Time
Facsimile of one of William Henry Ireland's forgeries, a primitive self-portrait of William Shakespeare(tinted engraving). Published for Samuel Ireland, Norfolk Street, Strand, December 1, 1795. (W.H. Ireland, forgery)
The Time a Law Clerk Successfully Forged a New Shakespeare Play to Impress His Dad
Four year old boy with grandfather and father lighting Hanukkah menorah. Photo taken on: December 21st, 2009
Which Is Correct: Hanukkah or Chanukah?
Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland
The Largest Islands in the World
The Prado Museum facade at the Diego Velaszquez memorial. Established in 1819, the museum is considered the best collection of Spanish art and one of the world's finest collections of European art. Madrid, Spain
20 Paintings You Have to Visit at the Museo del Prado in Madrid
Stylish light blue jeans on wooden background, closeup of inset pocket
Why Do Jeans Have That Tiny Pocket?
Coriander leaves, fresh green cilantro on wooden background, herbs
Why Does Cilantro Taste Like Soap to Some People?

Office of Strategic Services

United States government agency
verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Share
Share to social media
URL
https://mainten.top/topic/Office-of-Strategic-Services
Feedback
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Thank you for your feedback

Our editors will review what you’ve submitted and determine whether to revise the article.

External Websites
Also known as: OSS
Written and fact-checked by
The Editors of Encyclopaedia Britannica
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.
The Editors of Encyclopaedia Britannica
Last Updated: • Article History
Quick Facts
Date:
1942 - 1945
Areas Of Involvement:
intelligence
military intelligence
sabotage

Office of Strategic Services (OSS), agency of the U.S. federal government (1942–45) formed for the purpose of obtaining information about and sabotaging the military efforts of enemy nations during World War II. It was headed by William J. (“Wild Bill”) Donovan (1883–1959). With some 12,000 staff members, the OSS collected and analyzed information on areas of the world in which U.S. military forces were operating. It used agents inside Nazi-occupied Europe, including Berlin, carried out counterpropaganda and disinformation activities, produced analytical reports for policy makers, and staged special operations (e.g., sabotage and demolition) behind enemy lines to support guerrillas and resistance fighters. Many of its functions were later assumed by the Central Intelligence Agency.

This article was most recently revised and updated by Maren Goldberg.