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  1. Military history is the study of armed conflict in the history of humanity, and its impact on the societies, cultures and economies thereof, as well as the resulting changes to local and international relationships.

  2. Há 1 dia · United States Army, major branch of the United States armed forces charged with the preservation of peace and security and the defense of the country. The army furnishes most of the ground forces in the U.S. military organization. Origins in the American Revolution and early republic. Washington, George.