The 11th Infantry was constituted on 3 May 1861 by President Abraham Lincoln. It was organized on 6 May 1862 at Newport Barracks, Kentucky, first as part of the Army of the Ohio and later, a part of the Army of the Cumberland, taking part in such battles as Shiloh, the Kentucky Campaign, Chickamaugua, Murfreesboro, the Battle of Atlanta, and the march through Georgia. Following the Civil War, the regiment became known as the Wandering 11th. Between 1898 and 1920, the 1st Battalion made 29 changes of station, including seven years of foreign service. The regiment participated in the Indian Campaigns until the war with Spain in 1898 and saw action in the Puerto Rican Campaign, from 1904 to 1913, the regiment was stationed in the west and saw duty in San Francisco following the 1906 earthquake which almost destroyed the city. The regiment also served as border guards in Texas, New Mexico, and Arizona, during threatened border trouble with Pancho Villa and his outlaw army.
On 24 April 1918, the regiment sailed for France. By May of 1918 it joined the 5th Division near Chaumont, France. The 11th then took part in the Vosges Mountains, St. Mihiel, and Meuse-Argonne offensives. In the second phase of the Meuse-Argonne offensive, the regiment forged a brilliant crossing of the Meuse River.
In 1922, the 11th moved to Fort Benjamin Harrison, Indiana, and remained there for 17 years.
In 1939, the 11th joined the 5th Division at Fort McClellan, Alabama and by 1942 was on its way to Iceland and remained there for 15 months until the regiment moved to England. The regiment landed in Normandy on 10 July 1944 and fought its way across France as part of General Patton's famed Third Army. The 11th Infantry played a prominent role in the reduction of the fortified city of Metz in the fall of 1944. During the Battle of the Bulge, the 11th counter-attacked into the southern portion of the Bulge, engaging the Germans in bitter winter fighting. On 22 March 1945, the 1st Battalion made a night river assault across the Rhine River at Oppenheim, giving General Patton a division bridgehead over the Rhine two days ahead of Field Marshall Montgomery's famous crossing. The 11th Infantry ended the war in Czechoslovakia.
Shortly after its return from the European Theater of Operations, the regiment was retired. It was reactivated in June 1954 in Germany, the 11th returned to Fort Ord, California and became an Infantry Training Unit.
On 14 June 1958, the 1st Battle Group, 11th Infantry, was reactivated as part of the 2d Infantry Division at Fort Benning, Georgia where it remained until February 1962 when it was redesignated as the 1st Battalion, 11th Infantry and assigned as an organic element of the 5th Infantry Division at Fort Carson, Colorado.
In July 1968, the 11th deployed for action in Vietnam and operated in Cam Lo, Dong Ha, Quang Tri, and Khe Sanh. The 11th returned to Fort Carson on 6 August 1971 and served there as part of the 4th Infantry Division until 15 January 1984 when the battalion was inactivated.
On 14 August 1987, 1st , 2d, and 3d Battalions, The School Brigade, were redesignated as 1st, 2d, and 3d Battalions, 11th Infantry, and assigned to The School Brigade. On 8 February 1991, the School Brigade was inactivated and redesignated as the 11th Infantry Regiment. On 27 June 2007, the 11th Infantry Regiment was redesignated the 199th Infantry Brigade. Today, under the 199th Infantry Brigade, 2-11th Infantry is the home of the Infantry Basic Officer Leadership Course. 3-11th Infantry operates the Federal Officer Candidate School.
During the summer of 1940 General George Marshall recognized the absolute importance of establishing rigorous training facilities for new officers. His vision for this officer training was first put into action at Fort Benning, Georgia. Brigadier General Asa L. Singleton, Commandant of the Infantry School, established the plan for the modern Officer Candidate School for Infantry. His plan went into effect in July 1941 as the Infantry, Field Artillery, and Coastal Artillery Officer Candidate Schools. Other branches later followed with their own Officer Candidate Schools. The first Infantry OCS class began with 204 candidates, and on September 27, 1941, graduated 171 second lieutenants. General Omar Bradley, former Commandant of the Infantry School, is credited with establishing the foundation of training still used in OCS today.
General Bradley emphasized rigorous training, strict discipline and efficient organization. These tenets remain the base values of today’s Officer Candidate School. After World War II, Infantry OCS was transferred to Fort Riley, Kansas as part of the Ground General School. Subsequently all other Officer Candidate Schools were discontinued to include the Infantry OCS which was eliminated on November 1, 1947.
A shortage of officers during the Korean conflict caused the Department of the Army to re-open Infantry OCS at Fort Benning on February 18, 1951 and lengthen the course from 17 to 22 weeks. The Infantry Officer Candidate School became the First Officer Candidate Battalion, Second Student Regiment. The strength of OCS increased rapidly. As one of eight branch programs, Infantry OCS included as many as 29 companies with a class graduating every week. During the Korean War, OCS commissioned approximately 7,000 Infantry officers. On August 4, 1953, the Department of the Army reduced OCS from eight to three programs: Infantry, Artillery, and Engineer, and with the onset of the Vietnam conflict, further reduced the OCS program to only 2 branches: Infantry and Field Artillery. During the height of the Vietnam Conflict, Infantry OCS produced 7,000 officers annually from five battalions. Towards the end of the conflict, Female OCS was established and operated at Fort McClellan, Alabama. A Branch Immaterial OCS was additionally established at Fort Benning in April 1973. The two programs merged in 1976 to produce a program very similar to the modern OCS consisting of a 14 week training cycle.
OCS has continued to grow and adapt to meet the needs of the Army. The addition of C Company in June 2000, and D Company shortly after increased the Battalion strength to four line companies. The most recent addition, E Company, was activated in October 2005 and began training in January of 2006. Each company trains up to 160 officer candidates during a class and conducts up to three classes a year. This increased operational structure is a reflection of OCS’ ability to transform and execute its mission to meet the needs of a fast pace and changing Army. The mission of OCS will always remain constant: train selected personnel in the fundamentals of leadership, basic military skills; instill professional ethics, evaluate leadership potential, and commission those who qualify as second lieutenants in all sixteen basic branches of the Army.