As a response to the Great Depression in 1931 Germany adopted a policy of exchange control where the movement of foreign currency was subject to government control. This regime served as a defense measure against currency devaluation but it inhibbited international payments among exchange control countries.Trade between them was organized on the basis of bilateral clearing agreements, which centralized both foreign trade and payments at the state level. The book analyzes the clearing system in the case of Germany's relations with Bulgaria, which developed the highest trade dependence on Germany in the 1930s. An almost complete opposition of free trade, bilateral clearing is seen as a mechanism of political power maximization and resource allocation from the periphery to its core. Using Jonathan Kirshner's framework of monetary power the work offers a detailed analysis of the link between international monetary relations and political power. The shift of international trade regimefrom a Gold Standard and free trade to exchange control and bilateral clearing provided an opportunity for the German government to covertly finance its expenditure in the 1930's and during WWII.