In 2012 Živković was among a group of Serbian nationalists who erected barricades in North Kosovo to prevent Kosovar authorities from reaching Serb municipalities.

[3] He later served as a "Russian Separatist" during the War in Donbass as part of the "Unité Continentale" foreign volunteer unit within the Donetsk People’s Republic.

[4] In 2015 Živković attempted to smuggle a group of his Chetniks into Northern Macedonia to participate in anti-Albanian fighting in Kumanovo but was detained at the border.

[6] The Romanian Intelligence Service stated that Živković was "showing interest in obtaining classified documents on critical infrastructure and national and allied military objectives located in south-east Romania with the intention of affecting our strategic partnerships.

"[6] In 2017 he visited the port city of Constanța four separate times and was caught photographing military radars and the Mihail Kogălniceanu airbase.