The Polish Victory Service (Sluzba Zwyciestwu Polski) was formed in the besieged Warsaw on 27 September 1939. The organization was an embryo of the subsequently developed Polish underground state. As spelled out by its founders, one military and civilian underground organization should channel all the effort of the Polish people in pursuit of independence. In October 1939, the Chief Political Council of the Polish Victory Service was established, encompassing the representatives of major political parties operating together: the Polish Socialist Party (PPS), the Democratic Party (SD), the Peasants’ Party (SL) and the National Party (SN).

The primary task of the Polish Underground State was to prepare and execute a general uprising which would liberate Poland. Respectively, in parallel with the development of territorial structures, special formations, intended to carry out assigned tasks, were created in the Union of Armed Struggle and later the Home Army. It is worthwhile to mention one of them – the ”Folding Fan” (in Polish: Wachlarz) set up to shield the planned national insurgence from the east.