The Holocaust in the Independent State of Croatia is a term which is primarily used in reference to the genocide of Jews, but sometimes, it is also used in reference to the genocide of Serbs (the Genocide of the Serbs) and Romani ("Porajmos"), within the Independent State of Croatia (, NDH), a fascist puppet state which existed during World War II, was led by the Ustaše regime, and ruled an occupied area of Yugoslavia which included most of the territory of modern-day Croatia, the whole of modern-day Bosnia and Herzegovina and the eastern part of Syrmia (Serbia). Of the 39,000 Jews who lived in the NDH in 1941, the United States Holocaust Memorial Museum states that more than 30,000 were killed. Of these, 6,200 were shipped to Nazi Germany and the rest of them were killed in the ISC, the vast majority were killed in Ustaše-run concentration camps, such as Jasenovac. The Ustaše were the only quisling forces in Europe who operated their own extermination camps for the purpose of killing Jews and members of other ethnic groups.