The troops organised for children between 12 and 14 years of age were code-named after Zawisza Czarny, a famous Polish medieval knight and diplomat. The troops did not take part in active resistance. Instead, the children were prepared for auxiliary service for the upcoming all-national uprising and taught in secret schools for their future duties in liberated Poland. Among the best-known auxiliary troops formed by the Zawiszacy was the Scouting Postal Service organised during the Warsaw Uprising.