At Fort Campbell, the 20th Engineer Battalion consisted of a Headquarters and Headquarters Company, four line companies, and an attached Medium Girder Bridge Company. The Headquarters and Headquarters Company had nine sections: administration (S-1), intelligence (S-2), operations (S-3), supply (S-4), maintenance, communications, medical, heavy equipment, and combat construction. Each of the four line companies had three combat engineer platoons, one headquarters section, and one mobility/countermobility platoon.
In 1992, the battalion was ordered to move from Fort Campbell, Kentucky to Fort Hood, Texas to become a part of the 1st Cavalry Division. Mechanized divisions, which had previously had only one engineer battalion, were reorganized as a part of the Engineer Restructure Initiative to have three engineer battalions and an engineer brigade headquarters. The 20th Engineer Battalion, while at Fort Campbell a Corps Wheeled Engineer Battalion assigned to Forces Command, was reorganized at Fort Hood as a mechanized engineer battalion at Fort Hood.
The change was significant. The Battalion at Fort Campbell was authorized 809 soldiers. Under the ERI system, the Battalion was authorized 444 soldiers.
Upon completion of ERI, the 20th Engineer Battalion consisted of a Headquarters and Headquarters Company, three line companies, and a support platoon. The Headquarters and Headquarters Company had seven sections: administration (S-1), intelligence (S-2), operations (S-3), supply (S-4), maintenance, communications, and medical. Each of the three line companies consisted of two combat engineer platoons, one headquarters section, and an assault and obstacle platoon.
--The update below is from the active Army site maintained by Capt. Brennan at http://pao.hood.army.mil/1CD_20thEngr/history.html
In June 1992, the 20th Engineers moved to Fort Hood to reorganize as part of the 1st Cavalry Division. Beginning in 1994, the battalion deployed yearly to the National Training Center with the 1st Brigade Combat Team (IRONHORSE), executing highly successful mobility, countermobility, survivability and force protection missions during every rotation.
In addition to the yearly rotations to the National Training Center, the battalion stood ready to execute its no notice missions.
In August 1994, the battalion deployed as a task force headquarters to fight forest fires in the Boise National Forest, Idaho.
In the Fall of 1995, Charlie Company and a portion of the Headquarters deployed with Task Force 2-8 CAV to the mountains of Korea in support of Operation Foal Eagle. The deployed soldiers trained ROK soldiers, learned the Korean landscape and culture, and honed their war-fighting skills.
In February 1997, Charlie Company again deployed, this time with Task Force 1-7 CAV to the sands of Kuwait in support of Operation Sand Saber. The soldiers of Castle built ranges, trained with Kuwaiti soldiers and redeployed in June 1997.
In September 1998 the battalion deployed to Bosnia-Herzegovina to support peacekeeping operations for Operation Joint Forge. Assigned to support Task Forces 2-5 Cavalry, 1-8 Cavalry, and 2-8 Cavalry, the battalion was critical to the success accomplished during the deployment. The battalion conducted civil infrastructure reconstruction projects, identification of future area for de-mining operations, and was a significant contribution to maintaining the social stability within their respective sectors. Soldiers worked with both NATO and non-NATO allied forces in various projects such as bridge and route reconnaissance and bridge repair.
Re-deploying in March 1999, the 20th Engineer Battalion refocused its efforts towards warfighting as it prepared for a NTC train-up with the 1st Brigade Combat Team (IRONHORSE). During January 2000, the 20th Engineer Battalion provided excellent combat engineer support to 1BCT for NTC Rotation 00-04 on numerous defensive and offensive operations; proving once again that the 20th Engineer Battalion is ready for any mission anywhere.
In August 2000, the battalion with elements of the 1st Brigade Combat Team deployed to the Lolo National Forest in Montana to fight wild land forest fires. In December 2000, A Company deployed in support of Task Force 2-5 Cavalry for Operation Desert Spring in Kuwait.
From the shores of Omaha Beach, to the Ardennes Forest to the mountains of Korea to the sands of California and Kuwait, the battalion stands ready to train and respond to domestic and international crises as part of America’s First Team, the 1st Cavalry Division!"