Lessons Learned, Headquarters, 93rd Engineer Battalion (Const) Open PDF Document Details Document Type Technical Report Publication Date Nov 12, 1969 Accession Number AD0865903 Entities Organizations Adjutant General's Corps Tags Communities of Interest Human Systems Weapons Technologies DTIC Thesaurus Topics Abstracts Air Defense Army Artillery Concrete Construction Engineering Engineers Groundwater Landing Fields Lessons Learned Materials Military Engineering Observation Security Test And Evaluation United States