With the rise of the 1917 revolution, the Altai attempted to make their region a separate Burkhanist republic called Oyrot. Their support for the Mensheviks during the Civil War led to the venture's collapse after the Bolshevik victory and the later rise of Joseph Stalin. In the 1940s, during World War II and when he was directing numerous purges, his government accused the Altai of being pro-Japanese. The word "oyrot" was declared to be counterrevolutionary. By 1950, Soviet industrialization policies and development in this area resulted in considerable migration of Russians to this republic, reducing the proportion of Altai in the total population from 50% to 20%. In the early 21st century, ethnic Altaians make up about 31% of the Altai Republic's population.