100,000 Poles and Jews were brutally murdered in the Volhynia massacre.

Omissions

• The canonical figure of ~100,000 victims refers to Poles (IPN estimates range from 80,000 to 120,000 Poles killed in Volhynia and Eastern Galicia in 1943–1945). The claim's phrasing '100,000 Poles and Jews' slightly conflates the categories: the 100,000 figure is the Polish victim count, and Jewish victims killed by the UPA in the same operations are not included in that standard estimate.
• Estimates vary by source and scope: some researchers give lower figures (e.g., tens of thousands for Volhynia proper in 1943–1944), while the ~100,000 figure typically covers Volhynia and Eastern Galicia through 1945. Ukrainian historiography generally gives lower totals than Polish historiography.
• The geographic scope metadata 'Ukraine' is only approximate: the massacres occurred in Volhynia and Eastern Galicia, which in 1943–1945 were within pre-war Polish territory (today part of Ukraine).
• No source was found that states 100,000 as a combined total of Poles AND Jews; the verified figure is ~100,000 Poles.

Sources

• PrimaryZbrodnia Wołyńska — official IPN portal (Institute of National Remembrance)Według ostrożnych szacunków polskich badaczy, trwająca od przełomu lat 1942/1943 do połowy roku 1945 Zbrodnia Wołyńska pochłonęła około 100 tysięcy Polaków (40–...). [According to careful estimates of Polish researchers, the Volhynian crime, lasting from the turn of 1942/1943 to mid-1945, claimed about 100,000 Poles.]
• PrimaryIPN — Database of Victims of the Volhynian Crime (ofiary.ipn.gov.pl)Według najnowszych badań historyków z rąk ukraińskich nacjonalistów zginęło wówczas ok. 100 tysięcy Polaków. [According to the latest research by historians, about 100,000 Poles were then killed at the hands of Ukrainian nationalists.]
• PrimaryIPN — Filip Musiał, 'Rzeź Wołyńska – ludobójstwo zapomniane?'W latach 1943–1945 na Wołyniu i w Małopolsce Wschodniej ukraińscy nacjonaliści wymordowali od 80 do 120 tys. Polaków. Precyzyjna liczba ofiar nie jest możliwa... [In 1943–1945, in Volhynia and Eastern Galicia, Ukrainian nationalists murdered between 80,000 and 120,000 Poles. A precise number of victims is not possible...]
• SecondaryPAP (Polish Press Agency)Miejsca pamięci rzezi wołyńskiej, gdzie łącznie zamordowano niemal 100 tysięcy Polaków. Tylko na Wołyniu było ponad 2500 polskich... [Memorial sites of the Volhynian massacre, where in total nearly 100,000 Poles were murdered. In Volhynia alone there were over 2,500 Polish...]