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The Pentagon, headquarters of the United States Department of Defense.. The United States Department of Defense (DoD) has a complex organizational structure.It includes the Army, Navy, the Marine Corps, Air Force, Space Force, the Unified combatant commands, U.S. elements of multinational commands (such as NATO and NORAD), as well as non-combat agencies such as the Defense Intelligence Agency ...
Department of Defense Agencies, Field Activities, and others. Defense Advanced Research Projects Agency (DARPA) Defense Commissary Agency (DeCA) Defense Contract Audit Agency (DCAA) Defense Contract Management Agency (DCMA) Defense Counterintelligence and Security Agency (DCSA) Defense Finance and Accounting Service (DFAS)
The United States Department of the Army ( DA) is one of the three military departments within the Department of Defense of the U.S. The Department of the Army is the federal government agency within which the United States Army (U.S.) is organized, and it is led by the secretary of the Army, who has statutory authority under 10 United States ...
v. t. e. 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]
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. [5] [6] [7] The secretary of defense's position of command and authority over the military is second only to that of the president of the ...
Lloyd Austin. Lloyd James Austin III (born August 8, 1953) is a retired United States Army four-star general who has served as the 28th and current United States secretary of defense since January 22, 2021. Before retiring from the military in 2016, Austin served as the 12th commander of United States Central Command (CENTCOM), beginning in ...
National Space Defense Center - Co-located within JTF-SD, NSDC is a joint effort between the Department of Defense and the United States Intelligence Community responsible for detecting, warning, and defending against threats to military space systems, particularly those of the National Reconnaissance Office; U.S. Special Operations Command
Team: The smallest unit. A fire team consists of a team leader (usually a sergeant or corporal ), a rifleman, a grenadier, and an automatic rifleman. A sniper team consists of a sniper who engages the enemy and a spotter who assists in targeting, team defense, and security. 4 soldiers.