The paper deals with the characteristics, modalities and conceptual ground of Foucualt's understanding of historical analysis. In the first part it focuses on the results yielded from the archeological study of discursive practices.
After analyzing its problematic points, the paper passes to the method which is called by Foucault as genealogy. Among the results, this method has brought, concepts of bio-politics and bio-power are underlined.
The last part of the study is devoted to Foucault's reception of the famous Clausewitz's aphorism about the relationship between war and policy.