4th Engineer Battalion (United States) - Lineage

Lineage

Organized 31 December 1861 in the Regular Army at Washington, D.C., from new and existing companies of engineers as a provisional engineer battalion (constituted 28 July 1866 as the Battalion of Engineers)

Expanded between 14 March 1901 and 7 June 1901 to form the 1st and 2nd Battalions of Engineers (1st Battalion of Engineers—hereafter separate lineage)

2nd Battalion of Engineers expanded, reorganized, and redesignated between 1 July 1916 and 1 August 1916 as the 2nd Regiment of Engineers

2nd Regiment of Engineers expanded between 21 May 1917 and 20 June 1917 to form the 2nd, 4th, and 5th Regiments of Engineers (2d and 5th Regiments of Engineers—hereafter separate lineages)

4th Regiment of Engineers redesignated 29 August 1917 as the 4th Engineer Regiment.

Assigned 1 January 1918 to the 4th Division.

Unit deployed to France with the 4th Division between May and June 1918, making use of the British Shipping Program.

Unit returned to CONUS with the 4th Division in August 1919.

Unit Inactivated 21 September 1921 at Camp Lewis, Washington

Company A activated 24 July 1922 at Fort Bragg, North Carolina)

Relieved 15 August 1927 from assignment to the 4th Division and assigned to the 6th Division

Company A inactivated 30 September 1929

Relieved 1 October 1933 from assignment to the 6th Division and assigned to the 4th Division (later redesignated as the 4th Infantry Division) (Company A concurrently activated at Fort Benning, Georgia)

Redesignated 19 October 1939 as the 4th Engineer Battalion

Activated (less Company A) 1 June 1940 at Fort Benning, Georgia

Reorganized and redesignated 19 September 1942 as the 4th Engineer Motorized Battalion

Reorganized and redesignated 1 August 1943 as the 4th Engineer Combat Battalion

Departed New York Port of Embarkation on 18 January 1944

Arrived in England on 29 January 1944, and started to prepare for Deployment.

• Unit Deployed to Normandy on 6 June 1944, and entered Combat in the Normandy Campaign.

Normandy Campaign concluded on 24 July 1944.

Northern France Campaign started on 25 July 1944

Northern France Campaign concluded on 14 September 1944

Rhineland Campaign Started on 15 September 1944

Unit was withdrawn from the Rhineland Campaign on 16 December 1944 to engage in the Ardennes-Alsace Campaign.

Ardennes-Alsace Campaign concluded on 25 January 1945. Unit resumed combat in Rhineland Campaign.

Rhineland Campaign concluded on 21 March 1945

Central Europe Campaign started on 22 March 1945

Central Europe Campaign concluded on 11 May 1945

Unit returned to CONUS on 12 July 1945, and located at Camp Butner, North Carolina.

Unit was located at Camp Butner on 14 August 1945, which is when the war ended.

Inactivated 19 February 1946 at Camp Butner, North Carolina

Activated 6 July 1948 at Fort Ord, California

Redesignated 5 June 1953 as the 4th Engineer Battalion

Arrived Vietnam on 7 July 1966 The Battalion had its headquarters collocated with the 4th Infantry Division at Pleiku.

In March 1968, the Battalion moved its headquarters to Dak To

In April 1968, the Battalion moved its headquarters back to Pleiku.

In March 1970, the Battalion split its headquarters, with some elements located at Pleiku, with the rest at An Khe.

In April 1970, the Battalion consolidated its headquarters at An Khe

Unit returned to CONUS on 15 December 1970.

Inactivated 15 December 2004 at Fort Carson, Colorado, and relieved from assignment to the 4th Infantry Division

Headquarters and Headquarters Company activated 18 October 2006 at Fort Carson, Colorado (Support Company concurrently constituted and activated)

In February 2009, the Battalion deployed to Baghdad, Iraq in support of Operation Iraqi Freedom.

In April 2009, the Battalion moved to Kandahar, Afghanistan to support Operation Enduring Freedom.

In February 2010, the Battalion redeployed to Ft. Carson, CO, having completed a twelve month route clearance deployment in support of the Global War on Terror.