Russian separatist forces in Ukraine
Russian separatist forces in Ukraine, primarily the People's Militias of the Donetsk People's Republic (DPR) and the Luhansk People's Republic (LPR), were Russian and pro-Russian Ukrainian paramilitaries in the Donbas region of eastern Ukraine under the overall control of the Russian Federation. They were also referred to as Russian proxy forces.
Source: Wikipedia — Russian separatist forces in Ukraine (CC BY-SA 4.0)