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The United States of America has engaged in several military conflicts, of which only eleven have been formally declared as wars by the U.S. Congress.¹ The other "types of military engagements have included military combat authorized by Congress (without a formal declaration of war) or authorized by the United Nations Security Council Resolutions and funded by Congress."² This guide provides U.S. Government resources about the conflicts and wars from the War of Independence to the present, as of July 2025.
(Image sources clockwise from left: NAID: 301682, NAID: 300264, NAID: 542315, NAID: 6632557, NAID: 531225, and NAID: 12013172)
¹There were eleven times for five wars : War of 1812, Mexican-American War, Spanish-American War, World War I, and World War II. (Sources: Congressional Research Service(a), Congressional Research Service(b), U.S. House of Representatives, and U.S. Senate)
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