The greatest disgrace in the history of the USSR

GULAG. Only five letters, but what is behind them? Millions of mangled fates and shattered lives...
According to the Gulag History Museum, about 20 million prisoners passed through the correctional labor camps and prisons of this structure, approximately 2 million of whom were shot or died of hunger and unbearable working conditions. Among them were both hardened criminals and notorious "political" prisoners.