Analysis of information sources in references of the Wikipedia article "Donbas" in English language version.
By 1924 there were 158 Ukrainian schools in the Donbas; by 1930 44 per cent of the 'industrial apparat' was Ukrainian-speaking; while the percentage of the working class who considered themselves Ukrainian supposedly rose from 40.6 per cent in 1926 to 70 per cent in 1929 (the overall population of the Donbas was 60 per cent Ukrainian in 1926).
Russification was achieved first and foremost through the physical inflow of huge numbers of Russians in the years after 1945. Their numbers grew from 0.77 million in 1926 to 2.55 million in 1959 and 3.6 million in 1989. In percentage terms the number of Russians grew from 31.4 per cent in 1926 to 44 per cent in 1989.
{{cite book}}: CS1 maint: location missing publisher (link)'Ten thousand Cossacks were slaughtered systematically in a few weeks in January 1919 [...] 'And while that wasn't a huge number in terms of what happened throughout the Russia, it was one of the main factors which led to the disappearance of the Cossacks as a nation. [...]'