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U.S. Infantry

Infantry branch
USA - Army Infantry Insignia.png
Branch insignia.
Active 14 June 1775 – present
Country  United States of America
Branch United States Army
Home station Fort Benning, Georgia
Nickname(s) Queen of Battle
Motto(s) Follow me
Branch color Light Blue
Engagements Revolutionary War
Indian Wars
War of 1812
Mexican–American War
Utah War
American Civil War
Spanish–American War
Philippine–American War
Banana Wars
Boxer Rebellion
Border War
World War I
Russian Civil War
World War II
Korean War
Operation Power Pack
Vietnam War
Operation Eagle Claw
Invasion of Grenada
Invasion of Panama
Persian Gulf War
Somali Civil War
Kosovo War
War in Afghanistan
Iraq War

The Infantry Branch is a branch of the United States Army first established in 1775.

Ten companies of riflemen were authorized by a resolution of the Continental Congress on 14 June 1775. However, the oldest Regular Army infantry regiment, the 3rd Infantry Regiment, was constituted on 3 June 1784, as the First American Regiment

On 3 March 1791, Congress added to the Army "The Second Regiment of Infantry"

Army organized into seven infantry regiments, 1815

Ten one year regiments were authorized by the Act of 11 February 1847. and after the Mexican–American War reduced back to pre war levels. (Mexican War expansion added eight regiments (designated 9th–16th Infantry), 1847, but these were discontinued,)

Civil war expansion to 19 regiments

In a major expansion under General Order 92, War Department, 23 November 1866, pursuant to an act of 28 July 1866 (14 Stat. 332), 2d and 3d battalions of the existing 11th- 19th Infantry Regiments were designated 20th–37th Infantry Regiments, with four new regiments (38th–41st) to be composed of black enlisted men, and new 42d-45th Infantry Regiments for wounded veterans of the Civil War.

(Reduced by consolidation to 25 regiments, under General Order 17, War Department, 15 March 1869, with the 24th and 25th constituting the black enlisted force.)

On 2 February 1901, Congress passed the Army Reorganization Act which authorized five additional regiments (26th-30th).

The Militia Act of 1903 established the National Guard.

In 1916 Congress enacted the National Defense Act and under War Department General Orders Number 22 dated 30 June 1916 that ordered seven new Regiments to be organised; four in the Continental United States, one in the Philippine Islands (31st Infantry Regiment (United States), one in Hawaii (32nd Infantry Regiment (United States), and one, the 33rd Infantry, in the Canal Zone.

In 1917 a new numbering system was set up 1–100 for regular army, 101–300 for the national guard, 301 and up for the National Army (USA). 167 national guard units were renumbered from the old state system to the new federal system. However the "69th, and 71st New York" were able to lobby for their old 19th Century numbers which created doubles of these numbers.


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