 In October 1942, the Jewish Marine Corps managed to establish contact with the Polish Home Army, which was able to smuggle a small amount of weapons and explosives into the ghetto.Since the end of September 1942, the Jews started building fortified bunkers and shelters in the Warsaw Ghetto, and there were 600 by January 1943.Each fighter had a gun and several hand grenades (many of them home-made) or Molotov cocktails.