The Bielski brothers were a group of Jewish partisans during World War II, known for their efforts to resist the Nazi regime in occupied Poland. Led by Tuvia Bielski, the brothers formed a partisan group that provided shelter and protection to Jewish refugees, saving hundreds of lives. They operated in the Naliboki Forest, where they engaged in guerrilla warfare against German forces. The Bielski brothers' actions were significant in the context of the Holocaust, as they not only fought against the Nazis but also created a community for survivors. Their story has been depicted in various media, including the film Defiance, which highlights their bravery and humanitarian efforts.