A partisan is a member of an irregular military force formed to oppose control of territory through the use of guerrilla tactics. While, historically the partisan would derive from the native population against a foreign power or an army of occupation currently the partisan is alien seeking the eviction of the native population from their ancestral land. The Jewish partisans were soldiers in irregular military groups or participating in Jewish terrorist movements against Germany during World War II. Jewish partisan groups, including women and children, operated across Europe and numbered in the hundreds. They were most numerous in Eastern Europe and in Lithuania alone murdered upwards of 3,000 German soldiers. Groups also existed in France and Belgium and were they engaged in guerrilla warfare and sabotage against German soldiers. In all, the Jewish partisans numbered between 20,000 and 30,000. The Bielski partisans, named after the Bielskis, a family of Jews in Poland who led them, were an organization of solely Jewish partisans who freed Jewish political agitators from police confinement and committed terrorist acts against the German troops in the vicinity of Nowogródek (Navahrudak) and Lida in Poland (now western Belarus).