and August 12, 1941. In practice, the Hungarians deported many people whose families had lived in the area for generations. In some cases, applications for residency permits were allowed to pile up without action by Hungarian officials until after the deportations had been carried out. The vast majority of those deported were massacred in Kameniec-Podolsk (Kamianets-Podilskyi massacre) at the end of August. In the massacres of Újvidék (Novi Sad) and villages nearby, 2,550–2,850 Serbs, 700–1,250 Jews and 60–130 others were murdered by the Hungarian Army and "Csendőrség" (Gendarmerie) in January 1942. Those responsible, Ferenc Feketehalmy-Czeydner, Márton Zöldy, József Grassy, László Deák and others were later tried in Budapest during December 1943 and were sentenced, but some of them escaped to Germany. During the war, Jews were called up to serve in unarmed "labour service" (munkaszolgálat) units which were used to repair bombed railroads, build airports or to clean up minefields at the front barehanded. Approximately 42,000 Jewish labour service troops were killed at the Soviet front in 1942–43, of which about 40% perished in Soviet POW camps. Many died as a result of harsh conditions on the Eastern Front and cruel treatment by their Hungarian sergeants and officers. Another 4,000 forced laborers died in the copper mine of Bor, Serbia. Nevertheless, Miklós Kállay, Prime Minister from March 9, 1942, and Regent Horthy resisted German pressure and refused to allow the deportation of Hungarian Jews to the German extermination camps in occupied Poland. This "anomalous" situation lasted until March 19, 1944, when German troops occupied Hungary and forced Horthy to oust Kállay. The Holocaust Germany invades Hungary On March 18, 1944, Adolf Hitler summoned Horthy to a conference in Austria, where he demanded greater acquiescence from the Hungarian state. Horthy resisted, but his efforts were fruitless – while he attended the conference, German tanks rolled into Budapest. On March 23, the government of Döme Sztójay was installed. Among his other first moves, Sztójay legalized the Arrow Cross Party, which quickly began organizing. During the four days' interregnum following the German occupation, the Ministry of the Interior was put in the hands of László Endre and László Baky, right-wing politicians well known for their hostility to Jews. Their boss, Andor Jaross, was another committed anti-Semite. A few days later, Ruthenia, Northern Transylvania, and the border region with Croatia and Serbia were placed under military command. On April 9, Prime Minister Döme Sztójay