Here you find a transcript of the CIA file titled 'A Study of Assassination'. This unsigned and undated (estimated publication date: Dec 31st, 1953) 19-page typewritten file was part of a collection of CIA documents pertaining to Operations PBFORTUNE and PBSUCCESS and was declassified under the Freedom of Information Act on May 15, 1997. After years of answering Freedom of Information Act requests with its standard "we can neither confirm nor deny that such records exist," the CIA has finally declassified some 1400 pages of over 100,000 estimated to be in its secret archives on the Guatemalan destabilization program. An excerpt from this assassination manual appears on the Op-Ed page of The New York Times on Saturday, May 31, 1997.

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ADP 3-90, Offense and Defense, articulates how Army forces conduct the offense and defense. It contains the fundamental tactics related to the execution of these elements of decisive action. Tactics employs, orders arrangement of, and directs actions of forces in relation to each other. Commanders select tactics that place their forces in positions of relative advantage. The selected tactics support the attainment of goals. Tactics create multiple dilemmas for an enemy allowing the friendly commander to defeat the enemy in detail. Successful tactics require synchronizing all the elements of combat power. ADP 3-90 is the introductory reference for all Army professionals studying the art and science of tactics. The five chapters of ADP 3-90 focus on the tactics used to employ available means to prevail during large-scale ground combat (in the offense and the defense), and they constitute the Army’s collective view of how it conducts prompt and sustained tactical offensive and defensive operations on land. All tactics require judgment in application. This publication is not prescriptive, but it is authoritative. ADP 3-90 standardizes the lexicon commanders’ use to describe the conduct of offensive, defensive, and supporting enabling operations. It focuses on the employment of combined arms in combat operations.

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