When the Nazis invaded Eastern Europe and began their program of liquidation and brutality, partisan groups arose out of the citizenry to fight against these oppressors. In June 1941, the Germans entered the Soviet Union and persecuted all those that lay in their path to Moscow, including the Jews of Belarus. Once in the country, the Nazis began destroying villages and murdering innocents. Out of this terror, emerged ordinary people who decided to wage a guerilla war against the occupiers. The Beilski brothers greatly resisted the Holocaust by dedicating themselves to saving citizens, forming highly structured encampments, and participating in armed resistance against the Nazis. Thus, the Bielskis and their Otriad were a powerful force in saving Jewish lives and disrupting Nazi operations on the Eastern Front.