Lessons Learned, Headquarters, 20th Engineer Battalion (Combat) Open PDF Document Details Document Type Technical Report Publication Date Feb 24, 1970 Accession Number AD0866630 Entities Organizations Adjutant General's Corps Tags Communities of Interest Weapons Technologies DTIC Thesaurus Topics Army Artillery Civic Action Concrete Construction Distributors Dry Batteries End Items Engineers Landing Fields Lessons Learned Lubrication Materials Observation Production Test And Evaluation Warfare