In 2015, a far-left military political unit composed of internationalist volunteers called "Interunit" was built inside the Prizrak Brigade, and was operational until 2017. The emblem of the unit was that of the International Brigades of the Spanish Civil War. The bulk of the unit's volunteers came from Spain and it was commanded by an Italian fighter called "Nemo". By 2019, the foreigners mainly operated as part of the Prizrak Brigade's Unit 404 and the Biryukov-Markov Unit. The latter, alternatively called the "Volunteer Communist Detachment", is mostly composed of Communists and commanded by Pyotr Biryukov.
