Lessons Learned, Headquarters, 20th Engineer Battalion (Combat) Open PDF Document Details Document Type Technical Report Publication Date Jan 21, 1971 Accession Number AD0880292 Entities Organizations Adjutant General's Corps Tags Communities of Interest Weapons Technologies DTIC Thesaurus Topics Air Filters Air Intakes Army Artillery Bridges Construction Dump Trucks Engineers Fords Lessons Learned Load Distribution Materials Observation Schools Test And Evaluation United States Warfare