April 1923) large Russian and Belarusian communities were left on the Latvian side. Strategic concerns also played a part, because of an important railway junction within the Abrene region. The historian Edgars Andersons explains (in Latvijas vēsture 1914–1920 [Stockholm: Daugava, 1976]): "Especially in the north, the Russians had agreed to the Latvians' strategic demands, not complaining about the ethnographic principle having been disregarded. Several civil parishes were completely Russian." The population of the entire district in the census of 1935, divided by ethnicity, was as follows: 60,145 Latvians, 45,885 Russians, 1,558 Jews and 648 Belarusians. The demographics differed sharply on either side of the Viļaka ridge, which bisects the district – the eastern civil parishes had small ethnic Latvian minorities: 17% in Kacēnu pagasts, 5% in Linavas pagasts, 32% in Purvmalas pagasts, 5% in Augšpils pagasts, and 4% in Gauru pagasts. The civil parishes immediately to the west had strong Latvian majorities, ranging from 71% in Šķilbēnu pagasts to 91% in Viļakas pagasts. The town of Abrene itself, which developed around the Pytalovo railroad station, had 1,242 inhabitants, 484 of them ethnic Latvians. The inhabitants held Latvian citizenship regardless of ethnicity. Parliamentary Latvia pursued a liberal policy of multiculturalism, guaranteeing education in minority languages from 1919. Modern schools providing bilingual instruction in Latvian, Russian, Belarusian, Yiddish and Latgalian were constructed (by 1936 there were 162 primary schools and 3 secondary schools in the district). The Latvianization policies of the authoritarian president Kārlis Ulmanis resulted in curtailing multiculturalism after 1934. Many minority schools were closed. The Abrene district as a whole differed from most of Latvia by religion, too – it was 48% Orthodox, 38% Catholic, and 12% Lutheran. With the Soviet occupation in 1940, the German invasion in 1941, the Holocaust, the return of Soviet forces in 1944, and the illegal mobilization of Latvian citizens by both occupying powers, severe demographic changes took place. The transfer of the eastern part of the district to the RSFSR was decided by a decree from the Presidium of the Supreme Soviet of the USSR, based on a request by the Presidium of the Supreme Soviet of the Latvian SSR, in violation of even Soviet law (the 1936 constitution then in force required that changes in internal borders be confirmed by the Supreme Soviet of the USSR, not the Presidium). Though the official documents transfer 1075.31 square kilometers, 1293.6 square kilometers were actually transferred.