Lessons Learned, Headquarters, 69th Engineer Battalion (Construction) Open PDF Document Details Document Type Technical Report Publication Date Feb 15, 1970 Accession Number AD0868670 Entities Organizations Adjutant General's Corps Tags Communities of Interest Human Systems Weapons Technologies DTIC Thesaurus Topics Abstracts Air Force Army Artillery Civic Action Civil Affairs Concrete Construction Construction Materials Engineers Landing Fields Lessons Learned Maintenance Materials Storage Warfare Water Purification