157th Field Artillery Regiment ( United States ) The 157th Field Artillery Regiment has been both an infantry and field artillery regiment of the Army National Guard . The regiment was first constituted in 1917 from the 1st Colorado Infantry . The regiment was an infantry regiment as part of the 40th Infantry Division in World War I . It was an infantry regiment in the 45th Infantry Division during and after World War II . In 1950 it was removed from the 45th and after the Korean War assigned to the artillery . During the Cold War of the 1960s , 1970s and 1980s , the 1st and 2nd Battalions of the regiment operated the M110 howitzer . The retirement of the M110 system left many National Guard units without a mission . Some units received the MLRS system , and later the HIMARS system . Other units have had a number of different missions thrust upon them as commanders try to keep the units alive under budget cuts and reorganization . Currently the regiment may have up to four battalions : Lineage . Constituted 8 - February 1879 in the Colorado National Guard as the 1st Infantry Battalion . Expanded and redesignated 22 - March 1883 as the 1st Regiment Infantry Expanded and redesignated 15 - April 1893 as the 1st Infantry Regiment . ( not to be confused with the regular army 1st Infantry Regiment ) Mustered out of Federal Service 8 - September 1899 at San Francisco , CA . and reverted to state status as the 1st Infantry Regiment . 1st and 2nd Infantry consolidated 15 - June 1916 and designated as the 1st Infantry . Entire Regiment drafted into federal service 5 - August 1917 Consolidated 13 October 1917 with the 1st Colorado Cavalry ( organized in 1880 ) and consolidated unit designated as the 157th Infantry . Demobilized 29 April 1919 at Fort D . A . Russell ( Wyoming ) Redesignated 16 - November 1921 as the 157th Infantry , an element of the 45th Division . subsequently the 45th Infantry Division . Inactivated 3 - December 1945 at Camp Bowie Texas . Reorganized and federally recognized 8 - January 1947 with headquarters at Buckley Field ( Buckley Air Force Base ) Regiment broken up 1 - August 1955 and elements converted and redesignated as follows ; 144th Field Artillery Battalion consolidated 1 - February 1959 with the 168th Field Artillery Battalion ( See ANNEX 1 ) , the 183rd Field Artillery Battalion , and the 188th Antiaircraft Artillery Battalion , and reorganized and redesignated as the 157th Artillery , a parent Regiment under the Combat Arms Regimental System , to consist of the 1st , 2nd , 3rd , and 4th Howitzer Battalions . Redesignated 1 March 1972 as the 157th Field Artillery . Distinctive unit insignia . The distinctive unit insignia ( DUI ) was originally approved for the 157th Infantry Regiment on 12 June 1924 . It was subsequently redesignated for the 144th Field Artillery Battalion of the Colorado National Guard on 1 May 1956 . The insignia was redesignated for the 157th Artillery Regiment of the Colorado National Guard on 23 March 1961 and then redesignated for the 157th Field Artillery Regiment , Colorado Army National Guard on 28 August 1972 . The DUI is a gold color metal and enamel device 1 1 / 8 inches ( 2 . 86 cm ) in height overall consisting of a shield blazoned : Per fess embattled Gules and Or in chief two wigwam s of the second garnished of the first and in base a sea lion brandishing a sword in dexter paw of the last . Attached below and to the sides of the shield a Blue scroll inscribed " EAGER FOR DUTY " in Gold letters . The shield is scarlet and yellow which are the Spanish colors ; the parting line embattled in recollection of fortifications . The sea lion of the Philippines recalls that the fortification was the walled city of Manila . The two wigwams recall the Indian service in the frontier days . Campaign participation credit . All of the above WW II Campaign credits were earned as the 157th Infantry Regiment of the 45th Infantry Division .