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The United States Army is made up of three components: one active—the Regular Army; and two reserve components—the Army National Guard and the Army Reserve. Both reserve components are primarily composed of part-time soldiers who train once a month, known as Battle Assembly , Unit Training Assemblies (UTAs), or simply "drills", while ...
This is a list of current formations of the United States Army, which is constantly changing as the Army changes its structure over time. Due to the nature of those changes, specifically the restructuring of brigades into autonomous modular brigades, debate has arisen as to whether brigades are units or formations; for the purposes of this list, brigades are currently excluded.
See Structure of the United States Army for a detailed treatment of the history, components, administrative and operational structure and the branches and functional areas of the Army. The U.S. Army is made up of three components: the active component, the Regular Army; and two reserve components, the Army National Guard and the Army Reserve.
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 ...
The chain of command leads from the president (as commander-in-chief) through the secretary of defense down to the newest recruits. [2] [3] The United States Armed Forces are organized through the United States Department of Defense, which oversees a complex structure of joint command and control functions with many units reporting to various commanding officers.
The use of formalized ranks in a hierarchical structure came into widespread use with the Roman Army. [citation needed]In modern times, executive control, management and administration of military organization is typically undertaken by governments through a government department within the structure of public administration, often known as a ministry of defence or department of defense.
The Infantry Branch (also known as the "Queen of Battle") is a branch of the United States Army first established in 1775.. This branch, alongside the Artillery and Cavalry branches, was formerly considered to be one of the "classic" combat arms branches (defined as those branches of the army with the primary mission of engaging in armed combat with an enemy force), but is today included ...
For the first time, the division was the base element of the United States Army and remained as such until the Global War on Terrorism, when the Army switched its emphasis to brigades and brigade combat teams. Since the authorizations of permanent divisions, the United States Army has raised 128 separate divisions with unique lineages.