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  1. The United States Army ( USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution. [14] The Army is the oldest branch of the U.S. military and the most senior in order of precedence. [15]

  2. This is a list of countries by number of military and paramilitary personnel. It includes any government-sponsored soldiers used to further the domestic and foreign policies of their respective government. The term "country" is used in its most common use, in the sense of state which exercises sovereignty or has limited recognition .

  3. The United States Army (USA) is the United States Armed Forces' land force and is the largest and oldest service. Originally established in 1775 as the Continental Army, it consists of one million soldiers across the Regular Army, Army Reserve, and Army National Guard. [17]

  4. en.wikipedia.org › wiki › The_PentagonThe Pentagon - Wikipedia

    • Layout and Facilities
    • History
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    The Pentagon building spans 28.7 acres (116,000 m2), and includes an additional 5.1 acres (21,000 m2) as a central courtyard. Starting with the north side and moving clockwise, its five façade entrances are the Mall Terrace, the River Terrace, the Concourse (or Metro Station), the South Parking, and the Heliport.[citation needed] On the north side ...

    Background

    Until the Pentagon was built, the United States Department of War was headquartered in the Munitions Building, a temporary structure erected during World War I along Constitution Avenue on the National Mall. The War Department, which was a civilian agency created to administer the U.S. Army, was spread out in additional temporary buildings on the National Mall, as well as dozens of other buildings in Washington, D.C., Maryland and Virginia. In the late 1930s, during the Great Depression and f...

    Planning

    Government officials agreed that the War Department building, officially designated Federal Office Building No 1, should be constructed in Arlington County, Virginia, across the Potomac River from Washington, D.C. Requirements for the new building were that it be no more than four stories tall, and that it use a minimal amount of steel to reserve that resource for war needs. The requirements meant that, instead of rising vertically, the building would be sprawling over a large area. Possible...

    Construction

    Contracts totaling $31,100,000 (equivalent to $497 million in 2023) were finalized with McShain and the other contractors on 11 September 1941, and ground was broken for the Pentagon the same day. Among the design requirements, Somervell required that the structural design accommodate floor loads of up to 150 psi (1,000 kPa), in case the building became a records storage facility after the end of the war. A minimal amount of steel was used as it was in short supply. Instead, the Pentagon was...

    Protests

    During the late 1960s, the Pentagon became a focal point for protests against the Vietnam War. A group of 2,500 women, organized by Women Strike for Peace, demonstrated outside Secretary of Defense Robert S. McNamara's office at the Pentagon on 15 February 1967. In May 1967, a group of 20 demonstrators held a sit-in outside the Joint Chiefs of Staff's office, which lasted four days before they were arrested. In one of the better known incidents, on 21 October 1967, some 35,000 anti-war protes...

    September 11 attacks

    On September 11, 2001, coincidentally the 60th anniversary of the Pentagon, five al-Qaeda affiliated hijackers took control of American Airlines Flight 77, en route from Washington Dulles International Airport to Los Angeles International Airport, and deliberately crashed the Boeing 757 airliner into the western side of the Pentagon at 9:37 am EDT as part of the September 11 attacks. The impact of the plane severely damaged the outer ring of one wing of the building and caused its partial col...

    View of the Pentagon from the northwest during the building's construction in July 1942
    A view of the Pentagon from the southwest with the Potomac River and Washington Monumentin background in 1988
    Aftermath at the Pentagon from the September 11 attacks
    A September 11 anniversaryillumination at the Pentagon in 2007
  5. The Army of the United States is one of the four major service components of the United States Army (the others being the Regular Army, the United States Army Reserve and the Army National Guard of the United States ), [1] but it has been inactive since the suspension of the draft in 1973 and the U.S. military's transition to a ...

  6. The United States secretary of defense ( SecDef) is the head of the United States Department of Defense, the executive department of the U.S. Armed Forces, and is a high-ranking member of the federal cabinet.

  7. HRC is located on Fort Knox, Kentucky, and includes 40 operational elements around the country under the leadership of the HRC commander. HRC is the functional proponent for military personnel management (except for the Judge Advocate General's Corps and the Chaplain Corps ).