Beginning in March of 1942, during World War II in Yugoslavia, German authorities deported a total of 4268 prisoners from Yugoslavia to Norway where they were supposed to work as slave labor. Out of 4268 prisoners, 2287 or 53.58% were from German-occupied areas of Serbia. Almost all detainees from Serbia were Serbs, while among the remaining 1981 prisoners there were 1620 (81.78%) Serbs, 179 (9.03%) Muslims, 165 (8.32%) Croats, and 17 (0.85%) other. Approximately 60% of Yugoslav prisoners of war died in concentration camps, a proportion which was significantly higher than for example 10% of Soviets and 0.6% of Polish prisoners in Norway. In 1947 the Norwegian justice court reaffirmed that Yugoslav prisoners were put in pure concentration camps, created with the aim of the systematic extermination.