Abstract : This research study examined the Combat Ammunition System, Base-level (CAS-B). Specifically it addresses issues of the multi-level secure (MLS) designation of the system and the data within the system that requires it to be classified. The issue of classification is traced from development of the system, when it was intended to store data pertaining to nuclear munitions, to current use when no nuclear munitions data is stored. The report explains user problems caused by classification and highlights the fact that only a small fraction of data stored in CAS-B is indeed classified. Although CAS-B was designed and tested as an MLS, able to protect different levels of classified data on individual terminals, the system's MLS features have never been exploited. The report recommends that the WRM requirements be removed from CAS-B so it can be used as an unclassified system. Until this change is made, it should be used as a multi-level secure system.