during Napoleon's invasion of Russia. Šević's daughter was married to Stevan Petrović (formerly Šarović), who had moved from Podgorica to Slavo-Serbia. Pomorišje Military Frontier Šević was firmly opposed to the plans to disestablish Military Frontier in Pomorišje. When it was obvious that Pomorišje and Potisje would lose their frontier status, Šević decided to migrate to Russia. In the November 1750 plebiscite, he was the first higher-ranking officer who left the Habsburg army; he applied to be regular citizen and requested a passport to emigrate to Russia. To avoid issuing the passport to Šević, the government officials staged a trial against him and arrested him, but eventually lost the case because of the lack of evidence for their accusations. When Šević was in prison, the prosecution canvassed his rival, ambitious Jovan Horvat, who additionally accused Šević to support their case. When the prosecution lost their case because of the lack of evidence, Horvat left their side and became one of the most ardent supporters of migration to Russia. On 19 October 1751, Šević's passport was issued, but he did not travel to Russia immediately after he received it. He gradually sold his property and secretly tried to convince other military officers to join him and migrate to Russia. To prevent emigration of a larger number of Serbs to Russia, Habsburg Empress Maria Theresa issued a special decree () on 19 June 1752. People who would try to convince citizens of the Habsburg monarchy to move to another country and serve another empire would be executed. The Russian empress Elizabeth promoted Šević to the rank of General with the right to appoint other subordinated military officers who would join him to migrate to Russia. In September 1752, about a year after he received his passport, Šević led the second group of Serb colonists to Russian Empire. Slavo-Serbia Šević was among the Serbian military officers who led about 3,000 Serb families that emigrated to the region along river Donets. The group led by Šević was the second group of Serb emigrants to the Russian Empire. The first group settled the region which was referred to as New Serbia for some time. The second group, led by Šević, settled the territory which they named Slavo-Serbia. This name was initially proposed by Šević. They left Pomorišje in September 1752 and reached Kiev in December 1752. There, they were instructed to settle New Serbia governed by