of Yiddish as an official language of Byelorussian SSR and a corresponding national public education system in Yiddish, along with the promotion of Yiddish literature and theatre in these areas as well as in the larger Russian cities. Other minorities included Bulgarians, Greeks, Hungarians, Romani, Uigurs, Koreans, and Gagauz (today the Gagauz live in a compact area known as Gagauzia in the south of Moldova, where they enjoy a measure of autonomy). The Volga Germans lost their national territory with the outbreak of World War II in 1941. The peoples of the North had neither autonomous republics nor autonomous oblasts, but since the 1930s they have been organized in 10 national okrugs, such as the Chukotka Autonomous Okrug, the Koryak Autonomous Okrug, the Nenets Autonomous Okrug, and others. Besides national republics, oblasts, and okrugs, several hundred national districts (with populations between 10,000 and 50,000) and several thousand national townships (population 500 to 5,000) were established. In some cases this policy required voluntary or forced resettlement in both directions to create a compact population. The immigration of cross-border ethnic groups and the return of non-Russian émigrés to the Soviet Union during the New Economic Policy, albeit perceived as an easy cover for espionage, were not discouraged and proceeded quite actively, contributing to nation-building. Soviet fear of foreign influence gained momentum from sporadic ethnic guerilla uprisings along the entire Soviet frontier throughout the 1920s. The Soviet government was particularly concerned about the loyalty of the Finnish, Polish, and German populations. However, in July 1925 the Soviet authorities felt secure enough and in order to project Soviet influence outwards, exploiting cross-border ethnic ties, granted national minorities in the border regions more privileges and national rights than those in the central regions. This policy was implemented especially successfully in the Ukrainian SSR, which at first indeed succeeded in attracting the population of Polish Kresy. However, some Ukrainian communists claimed neighboring regions even from the Russian SFSR. National delimitation in Central Asia Rationale Russia had conquered Central Asia in the 19th century by annexing the formerly independent khanates of Kokand and Khiva and the Emirate of Bukhara. After the Communists took power in 1917 and created the Soviet Union it was decided to divide Central Asia into ethnically based republics in a process known as National Territorial Delimitation (NTD). This was in line with Communist theory that nationalism was a necessary step on the path