Lessons Learned, Headquarters, 45th Engineer Group (Construction) Open PDF Document Details Document Type Technical Report Publication Date Jul 31, 1969 Accession Number AD0861917 Entities Organizations Adjutant General's Corps Tags Communities of Interest Weapons Technologies DTIC Thesaurus Topics Ammunition Armored Personnel Carriers Army Artillery Bridges Construction Engineers Hand Grenades Launchers Lessons Learned Reinforced Concrete Rocket Launchers Rocket Propelled Grenades Schools Test And Evaluation United States Warfare