Lessons Learned, Headquarters, 577th Engineer Battalion Open PDF Document Details Document Type Technical Report Publication Date May 12, 1969 Accession Number AD0856164 Entities Organizations Adjutant General's Corps Tags Communities of Interest Human Systems Weapons Technologies DTIC Thesaurus Topics Abstracts Air Force Facilities Army Artillery Concrete Construction Engineers Explosive Charges Explosives Groundwater Lessons Learned Materials Reinforced Concrete Revetments Shear Pins Small Arms Vehicles