Lessons Learned, Headquarters, 20th Engineer Battalion Open PDF Document Details Document Type Technical Report Publication Date Jul 30, 1971 Accession Number AD0886519 Entities Organizations Adjutant General's Corps Tags Communities of Interest Counter WMD Weapons Technologies DTIC Thesaurus Topics Concrete Construction Construction Materials Detectors Engineers Landing Fields Lessons Learned Maintenance Maintenance Personnel Management Personnel Materials Quality Control Reinforced Concrete Retaining Walls Test And Evaluation Training United States