In 1928, Stalin launched his policies of rapid industrialisation and collectivisation.
Those who opposed fell fowl of the OGPU and the Red Army.
Collectivisation was met with fierce resistance from thousands of peasants.
Any peasant resisting collectivisation was liable to be labelled a kulak.
Thousands of peasants were shot, millions were arrested and taken to gulags or to the new industrial towns and cities to work as forced labour.
In some extreme cases, the Soviet air force was called in to bomb remote villages which refused to collectivise.
Peasant resistance was very damaging to Soviet agriculture with millions of animals being slaughtered and less grain being harvested.
By 1934, the peasant resistance had been crushed by the repressive reaction of the Soviet regime.
There was less overt opposition to the First Five Year Plan but the implementation of the policy was accompanied by an increase in the level of terror.
Undoubtedly, there were those who tried to disrupt the Five Year Plans but nowhere near as many as claimed by the government.
Often the victims of these early purges were managers, engineers and specialists who were now described as "bourgeois class enemies".
Terror was also used to motivate managers and workers to meet the demanding targets set by Gosplan.