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  1. The Pentagon - Wikipedia

    The Pentagon is the headquarters building of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was …

  2. Pentagon | History & Features | Britannica

    Jan 7, 2026 · Pentagon, large five-sided building in Arlington county, Virginia, near Washington, D.C., that serves as the headquarters of the U.S. Department of Defense, including all three …

  3. Historical Office > DOD/DOW History > Pentagon > History

    Three buildings housing great institutions of the U.S. government have come to be regarded as national monuments and have become part of national and international history: the White …

  4. About | U.S. Department of War

    Learn about DOW's rich history and innovations. The Pentagon, with its iconic design, is the headquarters of the Department of War. Find out more about DOW's mission and …

  5. Pentagon - Location, Building Timeline, 9/11 - HISTORY

    Dec 18, 2009 · The Pentagon is the Virginia headquarters of the U.S. Department of Defense, located in a massive five-sided concrete and steel building that’s a potent symbol of America’s …

  6. The Pentagon: America's Military Headquarters - Biography Host

    Jul 14, 2025 · Explore the history of the Pentagon, its construction, and its resilience through wartime and peace, including the 9/11 attacks and renovations.

  7. Pentagon building built | Research Starters - EBSCO

    The world’s largest office building, the Pentagon was built during World War II to house the entire War Department, which occupied various buildings throughout Washington, DC, before …

  8. The Pentagon in the USA - history, size, and tours

    Learn about the Pentagon in the US and plan your visit to the heart of the US Armed Forces

  9. Unveiling the Secrets of the Pentagon: America's Military Marvel

    Jun 23, 2025 · Explore the historical significance and renovations of the iconic United States Pentagon, dating back to 1943. Learn about its architecture, defense strategies, and recent …

  10. The Pentagon Explained

    The Pentagon is the headquarters building of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was …