Khe Sanh. The 11th Infantry participated in several major operations, including Operation Dewey Canyon II, Operation Wolfe Mountain, and Operation Green River. The 11th Infantry Regiment suffered 153 killed in Vietnam. 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. Modern day 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. The 1–11th was the Direct Commission Course and Basic Officer Leadership Course, Phase Two (BOLC II). 2–11th is the home of the Infantry Basic Officer Leadership Course (IBOLC/BOLC III). 3–11th is the Officer Candidate School. Since then, 1-11th has been consolidated into 3-11th, and both the Direct Commission Course and the Officer Candidate School reside in 3-11th Infantry. On 27 June 2007 as part of the Transformation of the US Army, the 11th Infantry Regiment was redesignated the 199th Infantry Brigade at Fort Benning. Distinctive unit insignia Description: A silver color metal and enamel device 1⅛ inches (2.86 cm) tall overall consisting of a shield blazoned: Azure, Satanta's arrow in fess Argent between in chief a castle Or in base a kampilan and bolo in saltire of the second hilted of the third. On a chief embattled of the second a cross Gules. Symbolism: The symbolism is that of the coat of arms. Background: The distinctive unit insignia was approved on 28 March 1923. Coat of arms Blazon Shield: Azure, Satanta's arrow in fess Argent between in chief a castle Or in base a kampilan and bolo in saltire of the second hilted of the third. On a chief embattled of the second a cross Gules. Crest: On a wreath of the colors a fusil Gules bearing a cross patée Argent charged with an acorn of the first. Symbolism: The shield is blue for infantry. Service in the Spanish War is shown by the castle and in the Indian Wars by Satanta's "arrow." The most important Indian campaign of this regiment was against the Kiowas, Comanches and Cheyenne in 1874. Satanta was a noted Kiowa chief who died just previous to this campaign. His "arrow" was really a spear with feathers on the end