In total, the number of ethnic Ukrainians who fought in the ranks of the Soviet Army is estimated from 4.5 million to 7 million. The pro-Soviet partisan guerrilla resistance in Ukraine is estimated to number at 47,800 from the start of occupation to 500,000 at its peak in 1944, with about 50% being ethnic Ukrainians. Generally, the Ukrainian Insurgent Army's figures are unreliable, with figures ranging anywhere from 15,000 to as many as 100,000 fighters.