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. As the oldest and most senior branch of the U.S. military in order of precedence, the modern U.S. Army has its roots in the Continental Army, which was formed to fight the American Revolutionary War (1775–1783)—before the United States of America was established as a country. After the Revolutionary War, the Congress of the Confederation created the United States Army on 3 June 1784 to replace the disbanded Continental Army. The United States Army considers itself to be a continuation of the Continental Army, and thus considers its institutional inception to be the origin of that armed force in 1775.
The United States Armed Forces are the military forces of the United States of America. It consists of six forces: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. The president of the United States is the commander-in-chief of the Armed Forces and forms military policy with the Department of Defense (DoD) and Department of Homeland Security (DHS), both federal executive departments, acting as the principal organs by which military policy is carried out. All six armed services are among the eight uniformed services of the United States.
Warrant officer (WO) is a rank or category of ranks in the armed forces of many countries. Depending on the country, service, or historical context, warrant officers are sometimes classified as the most junior of the commissioned ranks, the most senior of the non-commissioned officer (NCO) ranks, or in a separate category of their own. Warrant officer ranks are especially prominent in the militaries of Commonwealth nations and the United States.
A non-commissioned officer (NCO) is a military officer who has not earned a commission. Non-commissioned officers usually obtain their position of authority by promotion through the enlisted ranks. In contrast, commissioned officers usually enter directly from a military academy, Officer Candidate School (OCS), or Officer Training School (OTS) after receiving a post-secondary degree.
Staff sergeant is a rank of non-commissioned officer used in the armed forces of many countries. It is also a police rank in some police services.
Sergeant major is a senior non-commissioned rank or appointment in many militaries around the world. In Commonwealth countries, the various degrees of sergeant major are appointments held by warrant officers. In the United States, there are also various grades of sergeant major, all of the same pay grade of E-9; however, the Sergeant Major of the Army and the Sergeant Major of the Marine Corps, as their respective service's Senior Enlisted Advisor, receive a special rate of basic pay that is higher than all other sergeants major.
The chief of staff of the Army (CSA) is the service chief of the United States Army. As the highest ranking officer assigned to serve in the Department of the Army, the chief is the principal military advisor and a deputy to the secretary of the Army. In a separate capacity, the CSA is a member of the Joint Chiefs of Staff and, thereby, a military advisor to the National Security Council, the secretary of defense, and the president of the United States. The CSA is typically the highest-ranking officer on active duty in the U.S. Army unless the chairman or the vice chairman of the Joint Chiefs of Staff are Army officers.
A chief petty officer is a senior non-commissioned officer in many navies and coast guards.
The Sergeant Major of the Army (SMA) is a unique non-commissioned rank and position of office in the United States Army. The holder of this rank and position is the most senior enlisted member of the Army, unless an Army enlisted Soldier is serving as the Senior Enlisted Advisor to the Chairman. The SMA is appointed to serve as a spokesman to address the issues of enlisted soldiers to all officers, from warrant officers and lieutenants to the Army's highest positions. As such, they are the senior enlisted advisor to the Chief of Staff of the U.S. Army. The exact duties vary depending on the chief of staff, though much of the SMA's time is spent traveling throughout the Army, observing training and talking with soldiers and their families.
Ensign (; Late Middle English, from Old French enseigne "mark, symbol, signal; flag, standard, pennant", from Latin insignia is a junior rank of a commissioned officer in the armed forces of some countries, normally in the infantry or navy. As the junior officer in an infantry regiment was traditionally the carrier of the ensign flag, the rank acquired the name. This rank has generally been replaced in army ranks by second lieutenant. Ensigns were generally the lowest ranking commissioned officer, except where the rank of subaltern existed. In contrast, the Arab rank of ensign, لواء, liwa', derives from the command of units with an ensign, not the carrier of such a unit's ensign, and is today the equivalent of a major general.
Chief warrant officer is a military rank used by the United States Armed Forces, the Canadian Armed Forces, the Pakistan Air Force, the Israel Defense Forces, the South African National Defence Force, the Lebanese Armed Forces and, since 2012, the Singapore Armed Forces. In the United States Armed Forces, chief warrant officers are commissioned officers, not non-commissioned officers (NCOs) like in other NATO forces.
The surface warfare insignia is a military badge of the United States Navy which is issued to U.S. Navy personnel who are trained and qualified to perform duties aboard United States surface warships. There are presently four classes of the surface warfare pin, being that of line, staff, special operations, and enlisted. The line and enlisted surface warfare badges may be earned by United States Coast Guard personnel assigned to Navy commands. The various badge types are as follows:
In the United States Army, soldiers may wear insignia to denote membership in a particular area of military specialism and series of functional areas. Army branch insignia is similar to the line officer and staff corps officer devices of the U.S. Navy as well as to the Navy enlisted rating badges. The Medical, Nurse, Dental, Veterinary, Medical Service, Medical Specialist, Chaplains, and Judge Advocate General's Corps are considered "special branches", while the others are "basic branches".
Pay grades are used by the eight uniformed services of the United States to determine wages and benefits based on the corresponding military rank of a member of the services. While different titles or ranks may be used among the eight uniformed services, pay grades are uniform and equivalent between the services and can be used to quickly determine seniority among a group of members from different services. They are also essential when determining a member's entitlements such as basic pay and allowances.
In the United States Armed Forces, the ranks of warrant officer are rated as officers above all non-commissioned officers, candidates, cadets, and midshipmen, but subordinate to the lowest officer grade of O‑1. This application differs from the Commonwealth of Nations and other militaries, where warrant officers are the most senior of the other ranks, equivalent to the U.S. Armed Forces grades of E‑8 and E‑9.
The Singapore Armed Forces (SAF) has five rank schemes for active and reservist personnel, with a sixth for the auxiliaries of the SAF Volunteer Corps. The rank structure is largely unified, with identical rank insignia across the Singapore Army, Republic of Singapore Navy, and Republic of Singapore Air Force.
The Chief of the Air Staff's Warrant Officer (CASWO) is the senior RAF appointment for a OR9 warrant officer (WO), and therefore the most senior non-commissioned appointment in the Royal Air Force (RAF). The person holding this military appointment advises the Chief of the Air Staff (CAS) on matters concerning airmen and airwomen of the RAF. The post was created in 1996.
An officer is a member of an armed forces or uniformed service who holds a position of authority.
