"Ukrainian Insurgent Army (UPA)" . . "insurgency" . "Polish People's Republic:" . . "Ukraine" . . . "Ukrainians" . . . . . "Soviet Union:" . . . . . . "Ukrainian underground" . "UPA" . "red-and-black flags of Ukrainian nationalists" . "Source 1: 8,788 dead" . . . "Ukraininian nationalist's" . . . "the Ukrainian Insurgent Army" . "guerilla war of the Ukrainian Insurgent Army" . "Polish People's Republic" . . . "* Defeat of national partisans" . "Ukrainian Nationalists" . . . "Ukrainian Insurgent Army" . . . "300,000+ partisans (total)" . . . "~100,000 partisans (peak)" . . "OUN-UPA" . . "5,587 paramilitaries" . "Ukrainian Insurgency" . "Fights against Ukrainian Insurgent Army" . . . "Guerrilla war in Ukraine" . . . "red-and-black" . "Western Ukraine" . "red and black" . "UIA" . . "Ukrainian Insurgent Army insurgency" . "the UPA" . . "Ukrainian resistance" . . . . . . "Resistance fighter" . . . . . "Unknown" . . "nationalist insurgents" . . . . . . "UPA-West" . . . . "Soviet victory" . . . "12,000 dead and 2,600 missing in late 1944 to early 1945 alone" . . "followers had killed Vatutin" . "Source 2:" . . . . . "Variable" . . . . "Ukrainian nationalists" . . . . "Ukrainian Insurgent Army" . "Ukrainian Insurgent Army" . "Ukrainian partisans" . . "3,199 regular soldiers" . .