skos:altLabel | - 1st
- 1st Engineer Regiment
- 1st Brigade Engineer Battalion
- 1st Engineer Battalion
- 1st Engineer Battalion)
- 1st Engineer Combat Battalion
- 1st Engineers
- 21st Engineers
- Battalion U.S. Engineers
- Battalion United States Engineers
- Battalion, U.S. engineers
- U.S. Battalion
- U.S. Engineer Battalion
- US 1st Engineer Battalion
- United States Engineer Battalion
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