Instruct: Given a question, retrieve documents that can help answer the question.
Query: When was the United States Army established?
The United States Army (USA) is the land warfare service branch of the United States Armed Forces. It is one of the seven uniformed services of the United States, and is designated as the Army of the United States in the United States Constitution, Article 2, Section 2, Clause 1] and United States Code, Title 10, Subtitle B, Chapter 301, Section 3001].[9] As the oldest and most senior branch of the U.S. military in order of precedence,[10] the modern U.S. Army has its roots in the Continental Army, which was formed (14 June 1775) to fight the American Revolutionary War (1775–1783)—before the United States of America was established as a country.[11] After the Revolutionary War, the Congress of the Confederation created the United States Army on 3 June 1784 to replace the disbanded Continental Army.[12][13] The United States Army considers itself descended from the Continental Army, and dates its institutional inception from the origin of that armed force in 1775.[11]
The military use of Tallahassee Dale Mabry Field began in 1938 when the United States Army Air Corps established a contract flying school at the airport. In 1940 U.S. Senator Claude Pepper and Florida Governor Spessard Holland influenced the Army to make Dale Mabry Field a United States Army Air Force airfield as part of the buildup of the military prior to the United States entry into World War II. The airfield was named after Captain Dale Mabry of Tallahassee, who during World War I, experimented with the use of Balloons.
The Army Transport Service was established when the Army's difficulty in transporting its forces was exposed in the Spanish–American War with formal establishment in the fall of 1898 to operate under the Quartermaster Corps. ATS operated the Army's large ships but did not operate smaller vessels of the harbor boat service (tugs, launches, small and short range supply boats), the mine planters of the Coast Artillery Corps or any vessels of the Corps of Engineers. From that time until absorbed into the United States Army Transportation Corps to operate under its Water Division the service operated the United States Army Transports. Except during World War I, when the Army's large transports were turned over to the Naval Overseas Transportation Service (NOTS), ATS operated the sometimes sizable fleet of Army transports.
After World War II, the ORC and ERC were combined into the United States Army Reserve. The Army of the United States was re-established for the Korean War and Vietnam War and was demobilized upon the suspension of the Draft.
The Twelfth United States Army Group was the largest and most powerful United States Army formation ever to take to the field, commanding four field armies at its peak in 1945: First United States Army, Third United States Army, Ninth United States Army and Fifteenth United States Army. Formed eight days after the Normandy landings, it initially controlled the First and the Third US Armies. Through various configurations in 1944 and 1945, the Twelfth US Army Group controlled the majority of American forces on the Western Front. It was commanded by General Omar Bradley with its headquarters established in London on 14 July 1944.
United States Rangers were originally raised for Tecumseh's War, but they continued to serve against hostile Indians after the United States declaration of war against Great Britain. A total of 17 independent companies were authorized from Kentucky, Ohio, Indiana, Illinois and Missouri. The Rangers were not militia, but formed part of the war establishment of the United States Army. 
In readiness for possible Indian depredations after the Battle of Tippecanoe, the United States Congress established the United States Rangers, January 2, 1812. The act was renewed in 1813, and the number of ranger companies increased several times during the War of 1812. The President of the United States selected which state or territory should have the benefit of raising ranger companies. The Rangers were not militia, but formed part of the war establishment of the United States Army.
After the American Revolutionary War the Continental Army was quickly disbanded as part of the Americans' distrust of standing armies, and irregular state militias became the sole ground army of the United States, with the exception of one battery of artillery guarding West Point's arsenal. Then First American Regiment was established in 1784. However, because of continuing conflict with Native Americans, it was soon realized that it was necessary to field a trained standing army. The first of these, the Legion of the United States, was established in 1791.
When the United States Air Force was established as a separate service in 1947, the Army developed its light planes and rotary wing aircraft to support its ground operations. The Korean War and Vietnam War proved the growing capabilities of these aviation assets to perform a variety of missions not covered by the Air Force.
In 1941, the "Army of the United States" was founded to fight World War II. The Regular Army, Army of the United States, the National Guard and Officer/Enlisted Reserve Corps (ORC and ERC) existed simultaneously. After World War II, the ORC and ERC were combined into the United States Army Reserve. The Army of the United States was re-established for the Korean War and Vietnam War and was demobilized upon the suspension of the draft.[57]
The United States Army had always regarded the French Army as the best army in Europe, and consequently the US Army frequently copied French uniforms (the US Civil War) and aeroplanes. Only when France was rapidly overrun in 1940 did the US Army become "shocked" into re-thinking the influences by the perceived actions of German tanks in the 1939 Polish Campaign. Its Armored Combat Arm was not created until 1940 when The Armored Force was born on 10 July 1940, with the Headquarters, Armor Force and the Headquarters, I Armored Corps established at Fort Knox. On July 15, 1940, the 7th Cavalry Brigade (Mechanised) became the 1st Armored Division; the 7th Provisional Tank Brigade, an infantry tank unit at Fort Benning, became the 2nd Armored Division". The Tank Battalion was established at Fort Meade, Md., and a small Armored Force School was also established.
In 1938 First Army came under command of General Hugh A. Drum. Drum, who along with a buildup of the Army in 1939 and through the early 1940s, began to develop First Army into a bona fide field army. It began to establish and develop its own staff and participated in the large scale Army maneuvers in Louisiana and North Carolina between 1939 and 1941. As the United States entered World War II, Drum was assigned command of the newly established Eastern Defense Command, responsible for coastal and domestic defense, which relieved First Army of this responsibility on 24 December 1942. Drum retired in 1943 when he reached mandatory retirement age. General George Grunert, commander of Second Service Command, assumed command of First Army until Headquarters, First Army was activated in Bristol, England in January 1944 under command of General Omar Bradley.
The Army of the United States (AUS) is the official name for the conscripted force of the Army that may be raised at the discretion of the United States Congress, often at time of war or mobilization for war. The Army of the United States was first established in 1940 and its last use of the AUS was in 1974. The predecessors of the AUS were the National Army during World War I and the Volunteer Army during the American Civil War and Spanish–American War.
The Bermuda Base Command was a command of the United States Army, established to defend the British Colony of Bermuda, located 640 miles off Cape Hatteras, North Carolina. It was created in April 1941 when United States Army troops were sent to the island. 
The United States Army Air Corps (USAAC) was the aerial warfare service of the United States of America between 1926 and 1941. After World War I, as early aviation became an increasingly important part of modern warfare, a philosophical rift developed between more traditional ground-based army personnel and those who felt that aircraft were being underutilized and that air operations were being stifled for political reasons unrelated to their effectiveness. The USAAC was renamed from the earlier United States Army Air Service on 2 July 1926, and was part of the larger United States Army. The Air Corps became the United States Army Air Forces (USAAF) on 20 June 1941, giving it greater autonomy from the Army's middle-level command structure. During World War II, although not an administrative echelon, the Air Corps (AC) remained as one of the combat arms of the Army until 1947, when it was legally abolished by legislation establishing the Department of the Air Force.
Henry Post Army Airfield is a military use airport located at Fort Sill in Comanche County, Oklahoma, United States. This military airport is owned by United States Army. Established as Post Field in 1917, it was one of thirty-two Air Service training camps established after the United States entry into World War I in April 1917.
The establishment of U.S. Army Cyber Command in 2010 earmarked the Army’s entry into the new operational domain of cyberspace and perpetuated the lineage and honors of Second Army. The 1 October 2010, Headquarters Department of the Army (HQDA) General Orders No. 2010–26, which established Army Cyber Command, stated that it would "perpetuate the lineage and honors of the Second Army as specified by the United States Army Center of Military History." The Army Center of Military History agreed to use the naming convention established for geographic Army Service Component Commands, which would not have numbered Army designations; that is, the designation would be U.S. Army Cyber Command and not "Second Army"; only the lineage and honors of Second Army would be assigned to Army Cyber Command. General Orders No. 2010–26 redesignated the inactive Headquarters and Headquarters Company, Second U. S. Army, as U.S. Army Cyber Command, with its headquarters at Fort Belvoir, Virginia.
Historically, the United States Army included two components: the permanently established Regular Army, which constituted the peacetime force; and, during time of war, a much larger non-permanent establishment comprising various volunteer, conscript, and federalized state forces.
The US Army Supply Base in New Orleans is a former military supply depot that was established in 1919. It served the United States military installations in the Gulf Coast of the United States through two world wars, and up through 2005 when it was closed and sold to the city of New Orleans.
In 1880, the Salvation Army started its work in three others countries: Australia, Ireland, and the United States. Salvationists set out for the United States in 1880, and when George Scott Railton and his team arrived they started work in Harry Hill's Variety Theatre on 14 March 1880. The first notable convert was Ashbarrel Jimmie who had so many convictions for drunkenness that the judge sentenced him to attend the Salvation Army. The corps in New York were founded as a result of Jimmys' rehabilitation. It was not always an Officer of The Salvation Army who started the Salvation Army in a new country; sometimes Salvationists emigrated to countries and started operating as "the Salvation Army" on their own authority. When the first official officers arrived in Australia and the United States, they found groups of Salvationists already waiting for them and started working with each other. Australia was the place where the Army's organised social work began on 8 December 1883 with the establishment of a home for ex-convicts. In 1891 Booth established a farm colony in Hadleigh, Essex.
Under a September 2000 agreement with the Department of the Army, the Army Historical Foundation (AHF) was designated the fundraising entity for the National Museum of the United States Army. The army also established the National Museum of the United States Army Project Office to oversee the design and construction of the museum.
The United States Army Air Service (also known as the ""Air Service"", ""U.S. Air Service"" and before its legislative establishment in 1920, the ""Air Service, United States Army"") was the aerial warfare service of the United States between 1918 and 1926 and a forerunner of the United States Air Force. It was established as an independent but temporary branch of the U.S. War Department during World War I by two executive orders of President Woodrow Wilson: on May 24, 1918, replacing the Aviation Section, Signal Corps as the nation's air force; and March 19, 1919, establishing a military Director of Air Service to control all aviation activities. Its life was extended for another year in July 1919, during which time Congress passed the legislation necessary to make it a permanent establishment. The National Defense Act of 1920 assigned the Air Service the status of "combatant arm of the line" of the United States Army with a major general in command.
On 25 July 1866, the U.S. Congress established the rank of "General of the Army of the United States" for Ulysses S. Grant. When appointed General of the Army, Grant wore the rank insignia of four stars and coat buttons arranged in three groups of four.
The 6th United States Army Group was an Allied Army Group that fought in the European Theater of Operations during World War II. Made up of field armies from both the United States Army and the French Army, it fought in France, Germany, Austria, and, briefly, Italy. Also referred to as the Southern Group of Armies, it was established in July 1944 and commanded throughout its duration by General Jacob L. Devers.
Historically, the United States Army included two components: the permanently established Regular Army, which constituted the peacetime force; and, during time of war, a much larger non-permanent establishment comprising various volunteer, conscript, and federalized state forces.
The Office of The Inspector General of the United states Army dates back to the appointment of Augustin de la Balme (IG July 8, 1777October 11, 1777) as "inspector-general of the cavalry of the United States of America" and Philippe-Charles-Jean-Baptiste-Tronson Du Coudray (IG August 11, 1777September 15, 1777) as "Inspector General of Ordnance and Military Stores" during the American Revolutionary War. The first inspector general was Thomas Conway (IG December 13, 1777April 28, 1778). Next, Friedrich Wilhelm von Steuben (IG May 5, 1778April 15, 1784) was selected by Washington. The position continued, variously merged with, commanding or being commanded by the Adjutant General of the United States Army until after the American Civil War, when it was formally established as an office equivalent to other Army departments.