On the Soviet side, Beria’s NKVD massacred the inmates of its prisons near the front so that they would not be saved by the German advance. Nearly 10,000 Polish prisoners were murdered. In the city of Lwów alone, the NKVD killed around 4,000 people. The stench of decomposing bodies in the heat of late June permeated the whole town. The NKVD slaughter prompted Ukrainian nationalists to begin a guerrilla war against the Soviet occupiers. In a frenzy of fear and hatred, the NKVD massacred another 10,000 prisoners in the areas of Bessarabia and the Baltic states, seized the year before.
