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From the birth of the [[United States]] up till 1947 the branch of the federal government that dealt with [[military]] matters was called the War Department which was headed by the Secretary of War, a cabinet member. The [[Department of Defense]] was created along with the position of [[Secretary of Defense]] by the National Security Act of 1947. So what was the War Department and Secretary of War became the Department of Defense and the Secretary of Defense respectively.

From the birth of the [[United States]] up till 1947 the branch of the federal government that dealt with [[military]] matters was called the War Department which was headed by the Secretary of War, a cabinet member. The [[Department of Defense]] was created along with the position of [[Secretary of Defense]] by the National Security Act of 1947. So what was the War Department and Secretary of War became the Department of Defense and the Secretary of Defense respectively. <ref>http://www.history.army.mil/books/Sw-SA/SWSA-Fm.htm</ref>