In 1941, Yugoslavia surrendered unconditionally to the Axis powers during World War II. Hungary occupied Vojvodina. In January 1942, Moscovich's father was a victim of the Novi Sad massacre. His father died at age 44. In 1943, Hungary started secret armistice negotiations with the Allied Powers which was discovered by Germany resulting in the German occupation of Vojvodina. Soon after, at the age of 17, Moscovich was taken to the concentration camp at Auschwitz with his grandfather, grandmother and mother. His grandparents were immediately taken to the crematoria and were killed. While his mother stayed in Auschwitz, Moscovich was moved to Wustegiersdorf, one of the surrounding work camps, laying rail lines. In January 1945, Auschwitz was evacuated and Moscovich along with 60,000 prisoners marched west to Bergen-Belsen. After only a few days, Moscovich volunteered for a selection of 500 volunteer prisoner workers.