Approved for public release, distribution is unlimited / The rapidly growing threat to civilian populations from different terrorist organizations and nuclear states involved in regional conflicts require new unorthodox solutions. The purpose of this work is to analyze steps that have been taken on the European continent before and after September 11 in order to create a new, more efficient system of protection of the civilian population against CBRN terrorist attacks, and to explore NATO's role in the most problematic issues. The research examines what was done within NATO since 1998 by members of the Euro-Atlantic Partnership Council in the field of improving population protection against the consequences of CBRN terrorist attacks in two dimensions: national and international. This evaluation leads to the argument that supports the importance of the creation of an international system of mutual assistance in case of CBRN terrorist attacks under NATO's leading role. / Lieutenant Colonel, Ministry for Emergencies of Ukraine