In 1917, a popular uprising in Imperial Russia leads to the abdication of the throne, and a faction of far-left revolutionaries known as Bolsheviks rises to power, led by Vladimir Lenin. The Union of Soviet Socialist Republics (USSR) is formed in 1922, and Joseph Stalin, the former editor of the Bolshevik newspaper, is named Secretary-General of the Soviet Communist Party. It is a powerful perch from where he cultivates loyal supporters, and following Lenin’s death in 1924, Stalin begins ruthlessly eliminating potential rivals with arrests, sham trials, and executions. It marks the beginning of a brutally oppressive reign that continues into the 1930s. In what becomes known as the “Great Terror,” the Soviet secret police and Red Army enforce political conformity at gunpoint while imprisoning millions of dissenters in remote detention camps known as gulags.