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The United States Department of Defense, abbreviated DoD or DOD and sometimes called the Defense Department, is a civilian Cabinet organization of the United States government. The Department of Defense controls the U.S. military and is headquartered at The Pentagon. It is headed by the Secretary of Defense, who is currently Donald Rumsfeld.

1 History

Proposals to coordinate the activities of the military services were initially considered by Congress in 1944Events World War II January January 4 The Battle of Monte Cassino begins. January 5 Murder of Danish playwright Kaj Munck January 17 British forces, in Italy, cross the Garigliano River. January 20 The Royal Air Force drops 2,300 tons of bombs on Berlin;. Specific plans were put forth in 1945Events January January 5 The Soviet Union recognizes the new pro-Soviet government of Poland. January 7 British General Bernard Montgomery holds a press conference in which he claims credit for victory in the Battle of the Bulge. January 12 World War II: by the ArmyThe Army is the branch of the United States armed forces which has primary responsibility for land-based military operations. As of fiscal year 2002 (FY02), it consisted of 480,000 soldiers on active duty and 555,000 in reserve (350,000 in Army National G, the NavyThe United States Navy USN is the branch of the United States armed forces responsible for naval operations. Navy consists of slightly fewer than 300 ships and over 4,000 operational aircraft. It has over a half million men and women on active or ready re, and the Joint Chiefs of StaffThe Joint Chiefs of Staff is a panel comprising the highest-ranking members of each major branch of the armed services in any particular country. The following information refers to the Joint Chiefs of Staff of the United States Armed Forces, but similar. In a special message to Congress on December 19, 1945, President Harry Truman proposed creation of a unified Department of National Defense. A proposal reached Congress in April 1946, but was held up by the Naval Affairs Committee held hearings in July 1946 due to objections to the concentration of power in a single department. Truman eventually sent new legislation to Congress in February 1947, where it was debated and amended for several months.

On July 26, 1947, Truman signed the National Security Act of 1947, which set up the National Military Establishment to begin operations on September 18, 1947, the day after the confirmation of James V. Forrestal as the first Secretary of Defense. The Establishment had the unfortunate abbreviation NME (the obvious pronunciation being " enemy"), and was renamed to the "Department of Defense" on August 10, 1949; in addition, the secretary was given greater authority over the military departments of the Army, Navy, and Air Force.

The Department of Defense is based in The Pentagon in Arlington County, Virginia outside Washington, DC, across the Potomac River. It was created by combining the War Department (founded in 1789) with the Navy Department (founded in 1798; formerly the Board of Admiralty, founded in 1780), and the newly created Department of the Air Force. The department was formed in order to reduce interservice rivalry which was believed to have reduced military effectiveness during World War II.

It includes Army, Navy, Air Force, Marines, as well as non-combat agencies such as the National Security Agency and the Defense Intelligence Agency.

In wartime, the Department of Defense also has authority over the Coast Guard; in peacetime, that agency is under the control of the Department of Homeland Security. Prior to the creation of DHS, the Coast Guard was under the control of the Department of Transportation. The Coast Guard has not been formally militarized since World War II, although it has participated in various military and law enforcement operations over the years.

The DoD's annual budget is roughly $375 billion (~$1,300 per capita), which does not include billions more in supplemental expenditures alloted by Congress throughout the year.

The command structure of the Department of Defense is defined by the Goldwater-Nichols Act of 1986. Under the act, the chain of command runs from the President of the United States, through the Secretary of Defense, to the regional commanders within one of several commands who command all military forces within their area of operation. The Chairman of the Joint Chiefs of Staff and the several Chiefs of Staff are responsible for readiness of the U.S. military and serve as the President's military advisers, but are not in the chain of command. The Chairman of the Joint Chiefs of Staff is by law the highest ranking military officer in the United States.

On February 22, 2002, the Department of Defense Office of the Inspector General has reported that DOD has not and will not account for $1.1 trillion of "undocumentable adjustments."

As part of the September 11, 2001 attacks, terrorists crashed a plane into one of the sections of The Pentagon, causing part of it to collapse, killing 189 people.