The 19th Engineer Battalion is a United States Army combat engineering unit. This unit provides general engineering support during military operations. It is an Echelon Above Brigade (EAB) engineer unit, composed of five-line companies (15th Construction Company, 42nd Route Clearance Company, 502nd Multi-Role Bridging Company, 541st Sapper Company, 887th Engineer Support Company), one support company (Forward Support Company), one headquarters company (Headquarters and Headquarters Company), and one firefighting detachment (550th Fire Fighter Detachment). As of October 16, 2005, it is stationed at Fort Knox under the 20th Engineer Brigade, XVIII Airborne Corps. The 19th Engineer Battalion O/O deploys engineer forces to provide mission command and general engineer support to decisive action