This policy brief contains a succinct history of development and application of Territorial Defense Forces (TDF) during the new phase of Russian aggression after 24 February 2022. Conditions of TDF on the eve of Russian all-out aggression and employment concept evolution during 2022 have been studied. Legislation provisions adopted on the eve of a new phase of Ukraine-Russia war stipulating start of TDF system/national resistance overhaul have been described.

Policy brief contains assessment of TDF experience done using DOTMLPFI methodology. Employment of this methodology made it possible to reveal both strong and weak points of the TDF system. Document also determines the role and place of TDF forces within the current and future structure of Ukrainian Defense Forces taking into account unique features of the security environment, present/future threat and objective limitations.