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Subject
- Military engineering4
- Military research3
- United States. Army. Corps of Engineers3
- United States. Army2
- Vietnam War (1961-1975)2
- Vietnam War, 1961-19752
- Army Engineer Center and Fort Belvoir1
- Basic training (Military education)1
- Design and construction1
- Employees1
- Engineering1
- Equipment and supplies1
- Floods1
- Freedoms Foundation at Valley Forge1
- Heraldry1
- History1
- Inventions1
- Radiation preservation of food1
- Railroad engineering1
- Railroads1