Here are a couple of biographies for key commanders who led during the Battle of Long Tan.
Lt Col Harry Smith SG MC (retired) who was the Officer Commanding Delta Company, 6RAR. (309k .pdf)
Major Maurice ‘Morrie’ Stanley, MBE (Deceased) – Forward Observer (FO) 161 Battery, 16th Field Regiment Royal New Zealand Artillery attached to Delta Company, 6RAR. (324k .pdf)