Participation of the Slovak field army Bernolák in the German campaign to Poland in September 1939
Seventy years after the start of the German campaign into Poland, which the Poles called the Polish Defensive War or the September Campaign and which gave birth to World War II, it would seem that historians and the general public know all aspects of the war. Yet there are facts that were carefully concealed or suppressed until the 1990s, and only with the political changes in the Eastern Bloc countries did the possibility of comprehensive knowledge of them arise. The possibility of access to surviving original documents, no longer constrained by ideological ties, makes it possible to create new perspectives on facts that are little known to the public.