The İzmit massacres refer to atrocities committed in the region of İzmit, Turkey, during the Greco-Turkish War (1919-1922) which took place during the Greek genocide. An Inter-Allied Commission of Enquiry that investigated the incidents, submitted a report, on 1 June 1921, about the events. In general it accepted the Greek claims that Turkish troops massacred more than 12,000 local civilians, while 2,500 were missing and stated that the atrocities committed by the Turks in the Izmit peninsula "have been more considerable and ferocious than those on the part of the Greeks".