http://www.military-today.com/engineering/m728_cev.htm The M728 Combat Engineer Vehicle (CEV) was developed as an armored engineer support vehicle for breaching or removal of enemy roadblocks and obstacles, filing anti-tank ditches, construction of obstacles. Production commenced in 1965 and ceased in 1972. A total of 312 of these armored engineering vehicles were produced. This engineering vehicle saw service in Vietnam and was used during the Gulf War. More information on Military-Today.com website.