More than 100,000, possibly 200,000, Poles were killed by Ukrainians during the Second World War.
72% confidence
Foreign AffairsPoland
Omissions
The figure of 'maybe 200,000' is not supported by the Institute of National Remembrance or mainstream scholarship; the IPN estimate is about 100,000, and the commonly cited range is roughly 60,000–100,000.
The claim omits the reciprocal killings: the IPN estimates at least 10,000 Ukrainian victims of Polish retaliatory attacks (other estimates 10,000–12,000), which is essential context for the 'extermination' framing.
The claim's conflation of the 1943–45 OUN-UPA campaign with generic 'Ukrainian Nazi/Banderist' extermination of Poles throughout WWII is a political characterisation; the legal designation of the massacres as genocide (Polish Sejm resolution, 2016) is recognised in Poland but contested by many historians and by Ukraine.
No primary IPN document was retrieved in this search round; the ~100,000 figure is taken from secondary reporting that cites the IPN.
Sources
SecondaryCBS News — Human remains exhumed at site of controversial World War II massacres in Ukraine"The exact number of people killed at the time remains contested, but Poland's Institute of National Remembrance (IPN) estimates that about 100,000 people died in the 1943-45 anti-Polish campaign in the Volhynia, Eastern Galicia and Lublin regions. The institute also estimates that at least 10,000 died in Polish attacks of retaliation."
SecondaryVolhynia Massacre portal — The Effects of the Volhynian Massacres"Polish researchers cautiously estimate the number of Polish victims of the Volhynian massacres, which started during the winter of 1942/43 and ended in mid-1945, at approx. 100,000 (40,000–60,000 victims in Volhynia, 30,000−40,000 in Eastern Galicia, and at least 4,000 in today's Polish territory...)" and "The number of Ukrainian victims of Polish retaliatory attacks until the spring of 1945 is estimated at 10,000−12,000".