Lessons Learned, Headquarters, 69th Engineer Battalion (Construction) Open PDF Document Details Document Type Technical Report Publication Date Nov 15, 1970 Accession Number AD0883470 Entities Organizations Adjutant General's Corps Tags Communities of Interest Human Systems Weapons Technologies DTIC Thesaurus Topics Army Artillery Concrete Construction Construction Materials Engineers Indirect Fire Landing Fields Lessons Learned Materials Materials Testing Rice Paddies Security Test And Evaluation Training United States Vehicles