1. Within one month, around 100,000 had been arrested and 14,000 sent to gulags
2. By 1938, 575,000 people had been sentenced and 258,000 of them executed
3. Although the NKVD targeted people considered dangerous to the regime, many innocent people were also arrested
4. Pressure to meet targets meant people started to be arrested randomly
5. People were encouraged to report on their colleagues, friends and family