The Bielski group's partisan activities were aimed at the Germans and their collaborators (people who cooperated with the Nazis, like Belarusian volunteer policemen or local residents who had betrayed or killed Jews). The group also used sabotage to fight the Nazis. The Nazi regime offered a reward of 100,000 Reichsmarks to anyone who could help them catch Tuvia Bielski. In 1943, the Nazis led major efforts to get rid of all partisan groups in the area. Some of these groups suffered major casualties, but the Bielski partisans fled safely to a deeper part of the forest, and continued to offer protection to the non-fighters among their band.