The expansionist policy of territorial annexation promoted by the Great powers in southeastern Europe, common in eighteenth century, was continued in nineteenth century. In November 1806 started a new russo-turkish war, ended with a peace treaty, signed in Bucharest on 16/28 May 1812. By this treaty, Russian Empire annexed half of Moldova Principality (the lands between the Prut and Dniester rivers), later renamed Bessarabia. Occupation of Bessarabia by tsarist Russia was illegal, illegitimate and unfair. It was committed in violation of basic principles of international law. Thus, promoting an aggressive expansionist policy in southeastern Europe, the Russian Empire, in 1812, managed to transfer it’s borders on the Prut and Danube, annexing a foreign territory in terms of ethnic, historical, geographical, political and cultural terms. Eastern Moldova, with 44,422 km2 and about 500 000 inhabitants, is transformed into „oblast” (region) Bessarabia.