Lessons Learned, Headquarters, 27th Engineer Battalion (Combat) Open PDF Document Details Document Type Technical Report Publication Date Jul 31, 1970 Accession Number AD0880293 Entities Organizations Adjutant General's Corps Tags Communities of Interest Ground and Sea Platforms Weapons Technologies DTIC Thesaurus Topics Acquisition Army Army Aviation Artillery Concrete Construction Counterintelligence Engineers Lessons Learned Retaining Walls Revetments Schools Sheet Metal Supply Depots United States Walls Warfare