The documentary film is based on reconstructed archival films of the 1920 Polish-Soviet war, which ended in one of the greatest military successes of the Polish nation. The film also uses radio recordings, accounts of participants and witnesses to the events, as well as archival material testimony that has survived to our time: photographs, orders and records of secret reports. Polish Television carried out a digital reconstruction of century-old, previously unpublished archival films, including those from Soviet Union, France, Great Britain, the Czech Republic, Hungary and the USA.