Although HazMat (hazardous materials) and CBRNe (Chemical, Biological, Radiological, Nuclear and Explosives) emergency response share certain common ground, there have always traditionally been some fundamental differences in terms of the focus, method and priorities of each approach.
While HazMat incidents may have typically comprised smaller-scale, accidental and non-weaponized events, for example, CBRNe missions have tended to be in response to the deliberate use of chemical warfare agents (CWAs), often under battlefield conditions and within the context of planned, special intelligence operations.