#Christianity

Holodomor (1932–1933): Approximately 3.4 to 6.8 million Christians died in Ukraine, based on 3.5–7 million total deaths and a 97% Christian population.

Soviet Russia (1917–1953): An estimated 5 to 15 million Christians died due to famines, purges, gulags, and anti-religious campaigns, though this range is speculative due to overlapping causes and limited religious data