Constituted 7 December 1917 in the National Army as the 46th Engineers

Organized March-April 1918 at Camp Sheridan, Alabama

Converted and redesignated 18 September 1918 as the 46th Regiment, Transportation Corps

Regiment broken up 12 November 1918 and its elements reorganized and redesignated as follows:

Regimental Headquarters and Headquarters Company disbanded
Companies A, B, and C redesignated 12 December 1918 as the 29th, 30th, and 31st Companies, Transportation Corps, respectively

29th Company, Transportation Corps, demobilized 13 July 1919 at Camp Devens, Massachusetts; 30th and 31st Companies, Transportation Corps, demobilized 2 July and 11 July 1919, respectively, at Camp Gordon, Georgia

Regiment reconstituted 1 October 1933 in the Regular Army as the 46th Engineers

Activated 14 July 1941 at Camp Bowie, Texas

Redesignated 18 March 1943 as the 46th Engineer General Service Regiment

Reorganized and redesignated 22 April 1944 as the 46th Engineer Construction Battalion

Reorganized and redesignated 15 June 1947 as Headquarters and Headquarters and Service Company, 46th Engineer Construction Battalion (organic elements concurrently absorbed)

Inactivated 15 March 1950 in Japan

Redesignated 22 September 1950 as the 46th Engineer Construction Battalion and activated at Fort Sill, Oklahoma (organic elements concurrently reconstituted and activated)

Reorganized and redesignated 23 November 1953 as the 46th Engineer Battalion

Battalion reorganized 16 October 1999 as a multi-component unit; Company C concurrently inactivated and the 890th Engineer Company (Tennessee Army National Guard) reorganized and redesignated as Company C, 46th Engineer Battalion

46th Engineer Battalion Honors

Campaign Participation Credit

World War I: Streamer without inscription

World War II: East Indies; Papua; New Guinea; Leyte (with arrowhead); Luzon

Vietnam: Defense; Counteroffensive; Counteroffensive, Phase II; Counteroffensive, Phase III; Tet Counteroffensive; Counteroffensive, Phase IV; Counteroffensive, Phase V; Counteroffensive, Phase VI; Tet 69/Counteroffensive; Summer-Fall 1969; Winter-Spring 1970; Sanctuary Counteroffensive; Counteroffensive, Phase VII; Consolidation I

Southwest Asia: Defense of Saudi Arabia; Liberation and Defense of Kuwait

Company C (Paris, Tennessee) additionally entitled to:

World War II-EAME: Rhineland; Ardennes-Alsace; Central Europe

Decorations

Presidential Unit Citation (Army) for PAPUA

Meritorious Unit Commendation (Army) for LEYTE

Meritorious Unit Commendation (Army) for PHILIPPINE ISLANDS

Meritorious Unit Commendation (Army) for VIETNAM 1966-1967

Meritorious Unit Commendation (Army) for VIETNAM 1967

Meritorious Unit Commendation (Army) for SOUTHWEST ASIA

Army Superior Unit Award for 1995-1996

Philippine Presidential Unit Citation for 17 OCTOBER 1944 TO 4 JULY 1945

Republic of Vietnam Civil Action Honor Medal, First Class for VIETNAM 1967-1970