The 554th Engineer Battalion is an Engineer Battalion of the United States Army. It is currently based at Ft. Leonard Wood, Missouri where it trains Soldiers for the Engineer Branch.
The U.S. Army 554th Engineer Battalion left Fort Knox, Kentucky, in 1967; in California it boarded a ship for Vietnam. It was based at Cu Chi, Vietnam, from 1967 to 1969 with some elements at Phu Loi. There were also other elements TDY where needed from time to time. The battalion completed their duties but had casualties from two separate sapper attacks at Cu Chi in 1969. Most of 554th later moved to Lai Khe in 1970 where it maintained QL-13 between Lai Khe and An Loc. Some elements of the 554th were based at Firebases along QL-13 also known as Thunder Road. Along with infantry and artillery units, B Company of the 554th Eng's based its operations at Firebase Thunder III, along with elements of other 554th Companies. The Battalion completed their duties but had casualties at Lai Khe, on QL-13 and Firebase Thunder III.