After Vladimir Lenin died in 1924 at age 53 Joseph Stalin replaced Lenin after his death and Lavrenty Beria joined the NKVD led by Genrikh Yagoda (1891–1938) from 1934–1936 and Nikolai Yezhov from 1936–1938 which both replaced Felix Dzerzhinsky (1877–1926) and Vyacheslav Menzhinsky (1874–1934) in 1926 and in 1934. On 1 December 1934 the NKVD killed Sergei Kirov and it led to the Great Purge in 1936–1938. But in 1939 during the start of World War 2 the NKVD was involved in the Invasion of Poland (1939).
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