According to an official letter addressed in October 1941 to Lavrentiy Beria, in the period between the beginning of Operation Barbarossa to early December 1941, NKVD detachments had arrested 657,364 servicemen who had fallen behind their lines and fled from the front. Of these detainees, 25,878 were arrested, and the remaining 632,486 were formed in units and sent back to the front. Among those arrested included accused 1505 spies, 308 saboteurs, 2621 traitors, 2643 "cowards and alarmists", 3987 distributors of "provocative rumors", and 4371 others. 10,201 of them were shot, meaning approximately 1.5% of those arrested were sentenced to death.