Accusations of culpability are related with crimes perpetrated during WWII and during repression by Tito's communist Yugoslav Republic command, such as the massacres of Foibe and Kočevski Rog butchery. Mass graves are evidences of massacres; accusations of genocide and ethnic cleansing by historians. Accusations of guilt in the Bleiburg massacre, the repression of the Croatian Catholic Church, and the crackdown on the Croatian Spring or MASPOK.