Mutual Defense Assistance Act
United States law, part of the Marshall Plan
The Mutual Defense Assistance Act was a United States Act of Congress signed by President Harry S. Truman on October 6, 1949. For U.S. foreign policy, it was the first U.S. military foreign aid legislation of the Cold War era, and initially to Europe. The Act followed Truman's signing of the Economic Cooperation Act (the Marshall Plan), on April 3, 1948, which provided non-military, economic reconstruction and development aid to Europe.
The 1949 Act was amended and reauthorized on July 26, 1950. In 1951, the Economic Cooperation Act and Mutual Defense Assistance Act were succeeded by the Mutual Security Act, and its newly created independent agency, the Mutual Security Administration, to supervise all foreign aid programs, including both military assistance programs and non-military, economic assistance programs that bolstered the defense capability of U.S. allies.
About the same time, the Mutual Defense Assistance Control Act of 1951, also known or referred to as the Battle Act, (65 Stat. 644; 22 U.S.C. 1611 et seq.) was also passed; it banned U.S. assistance to countries doing business with the Soviet Union and was so-named after its sponsor, Representative Laurie C. Battle of Alabama. Strong motivation for this "control" act also came from export control concerns, following their tightening by the Export Control Act of 1949 over Soviet advances; export controls were used for both domestic policy and later as an instrument of foreign policy. This is exemplified by the restrictions on export of certain strategic or military items to the Soviet bloc or to other countries which it felt, if permitted, would be detrimental to the foreign policy program of the U.S. This latter motive became so strong that it brought legislation directing the President to enlist the cooperation of other nations in enacting controls on trade with the Soviet bloc to parallel those of the United States. The benefits of the various economic and military aid programs were to be withheld from non-cooperating nations.
The public source identifies “Mutual Defense Assistance Act” as united States law, part of the Marshall Plan. This brief keeps that definition visible, then builds a research path around Mutual, Defense and Assistance.
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Chronology, provenance and viewpoint should be read together before a broad social or political interpretation is accepted. The source revision retrieved here is dated Sep 10, 2026. The linked authority identifier is Q2779095. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1949, 1948, 1950 and 1951.
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This entry incorporates text from “Mutual Defense Assistance Act” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.