The NKVD, Gulag and show trials (Edexcel GCSE History): Revision Notes
The NKVD, Gulag and show trials

During the 1930s, Stalin established a comprehensive system of terror to control Soviet society and eliminate anyone he perceived as a threat. This terror was carried out through three main mechanisms: the secret police (NKVD), forced labour camps (Gulags), and public show trials. These institutions worked together to create a climate of fear that would help Stalin maintain absolute power.
Stalin's terror system
Stalin built his reign of terror using existing Bolshevik institutions, but expanded and refined them to unprecedented levels. The secret police administered this terror by receiving specific quotas for how many "enemies of the people" needed to be arrested. Once arrested, millions of Soviet citizens were processed through interrogation, trials, sentencing, execution, or imprisonment in labour camps.
This system was deliberately designed to be arbitrary and unpredictable, meaning that any Soviet citizen could become a victim regardless of their actual loyalty to the regime.
The terror served multiple purposes: eliminating real and imagined opposition, providing slave labour for economic projects, and creating such fear that people would not dare to oppose Stalin's policies.
The NKVD and its expanding role
The NKVD (People's Commissariat for Internal Affairs) evolved from earlier Bolshevik secret police organisations. Stalin first used the OGPU, then created the NKVD in 1934, which later became the KGB. This organisation became Stalin's primary instrument of terror.
Key functions of the NKVD
The secret police carried out several crucial roles in Stalin's terror system. They specialised in intimidation tactics designed to scare people into conforming to the system. They made arrests based on quotas rather than evidence of actual crimes. The NKVD also forced confessions through torture and psychological pressure, using what they called the "conveyor system" - repeated interrogation designed to break down prisoners mentally and physically.
From 1935 onwards, three-man teams of NKVD officers gained the power to decide whether people were innocent or guilty of crimes against the state. This represented a complete abandonment of legal principles and due process.
There was no legal process involved - no defence lawyers, no proper trials, and no appeals. This meant that once someone was accused, their fate was essentially sealed.
The organisation also ran the prison system and carried out executions. After the murder of Sergei Kirov in 1934, Stalin actually had the head of the NKVD executed for not acting quickly enough to track down "enemies." This sent a clear message that even the secret police were not safe from Stalin's paranoia, and it motivated them to pursue his enemies with even greater enthusiasm.
The Gulag system
The Gulags were forced labour camps that represented a new and expanded version of the prison camps that had existed under the Bolsheviks. However, Stalin transformed them into a massive system of slave labour that served both punitive and economic purposes.
Conditions in the camps
Life in the Gulags was deliberately harsh and often fatal. Prisoners received only thin uniforms that provided little protection against the brutal weather conditions they faced. Food was inadequate and of poor quality, leading to malnutrition and disease. Accommodation consisted of overcrowded shacks that offered minimal shelter.

Inmates were forced to perform extremely demanding physical labour for long hours each day. They were used as enslaved workers to extract natural resources like coal and to build infrastructure projects for the Soviet Union.
The death toll was enormous - historians estimate that perhaps 2 million people died in the Gulags due to the appalling conditions.
Geographic spread and purpose
The camps were strategically located across the USSR, with many situated in the harshest northern and eastern regions where winters were particularly severe. This placement served multiple purposes: it made escape virtually impossible, utilised prisoners to develop remote areas of the country, and ensured that the harsh climate would add to the punishment.
People from all parts of Soviet society were sent to the Gulags. This included political prisoners, but also ordinary citizens who had been accused of being kulaks (wealthy peasants) during collectivization, or anyone else deemed an "enemy of the people."
The show trials (1936-38)
The show trials were carefully orchestrated public proceedings designed to serve Stalin's political purposes rather than deliver justice. Only high-profile leading party members like Zinoviev and Kamenev were given these public trials, while millions of ordinary citizens were processed secretly.
Purpose and impact
These trials were essential to Stalin's strategy because they provided public justification for all the mass arrests that were taking place behind the scenes. By seeing respected party leaders confess to terrible crimes against the Soviet Union, ordinary people were convinced that enemies really were everywhere in their society.
The trials also served to give workers the power to denounce their managers and colleagues to the NKVD if they suspected them of disloyalty. This created an atmosphere where everyone was watching everyone else, making organised resistance to Stalin's rule virtually impossible.
The confessions obtained during these trials were not genuine admissions of guilt, but rather the result of torture, threats against family members, and psychological breakdown. However, they were presented to the public as proof that these former leaders had been working to destroy the Soviet Union.
Primary source evidence
Primary Source: Bukharin's Statement (1938)
A powerful example of how these trials worked can be seen in Bukharin's statement during his show trial in 1938:
"The monstrousness of my crimes is immeasurable especially in the new stage of the struggle of the USSR. May this trial be the last severe lesson, and may the great might of the USSR become clear to all."
This statement demonstrates how completely the NKVD had broken down even senior party members. Bukharin, who had been one of Lenin's closest associates and a major figure in the early Soviet government, was forced to declare his own crimes as "monstrous" and to praise the very system that was about to execute him.
Timeline of key events
- 1934: Murder of Kirov leads to intensification of terror; NKVD head executed for inadequate response
- 1935: Three-man NKVD teams given power to decide guilt without legal process
- 1936-38: Major show trials of prominent Old Bolsheviks like Zinoviev, Kamenev, and Bukharin
- 1930s: Gulag system reaches peak with camps spread across USSR
Key Points to Remember:
- The NKVD evolved from earlier Bolshevik secret police but became far more powerful and systematic under Stalin's rule
- Gulags served both as punishment and as a source of slave labour for economic development, with horrific conditions causing around 2 million deaths
- Show trials were public theatre designed to justify mass arrests and convince people that enemies were everywhere in Soviet society
- The entire system worked on quotas rather than evidence, making it arbitrary and unpredictable for ordinary citizens
- This terror system was crucial to Stalin's ability to maintain absolute control over Soviet society throughout the 1930s