Repression

Institutions

• the Cheka
• GPU
• OGPU (Combined State Political Administration
• NKVD

Methods

• purges (chistki)
• self-criticism (samokritika)
• verification (proverka)
• exchange (obmen)
• show trials

Terror

• Nikolai Ezhov
• Sergei Kirov
• 17th Party Congress ("Congress of Victors")
• Genrikh Iagoda
• Lavrentii Beria
• national operations
• kulak operations