Sponsored financially by the Ministry of Foreign Affairs of Nazi Germany, the Jungdeutsche Partei members trained in propaganda, sabotage and espionage activities against the Polish state,^[6] smuggled military weapons,^[7] and waged a campaign of intimidating other members of the community to leave for Nazi Germany, with tangible incentives.^[6] A considerable number of young Polish Germans joined the rank-and-file of the Party during the mid-1930s as a result of Nazi indoctrination and aggressive recruitment.^[8] The party had its own flag with JdP symbol in it, celebrated anniversaries (Heldengedenktag), a hymn sung at gatherings (Jungdeutsche marschiert) with a Nazi salute, and its own red armbands similar to NSDAP.^[9]

The Jungdeutsche Partei was formed originally in 1921 in Bielsko-Biała as the Deutscher Nationalsozialistischer Verein in Polen. Renamed in 1931 the party gradually expanded its activities to cover most of Upper Silesia with 1,200 members,^[10] and other regions such as Greater Poland (since 1934) as well as Pomerania and Volhynia in the following years.^[11][12] The public rallies held by the party were aggressively anti-Polish, rabidly racist, and anti-Jewish; while proclaiming to the world: "We want to be Germans, and nothing but Germans."^[13] JDP was dissolved by Adolf Hitler after the invasion of Poland with transfer of its membership to Germany.^[14]

• Deutscher Volksverband, the German People's Union in interwar Poland
• Deutsche Vereinigung, the German minority organization from northern Poland
• Sonderdienst, Nazi German paramilitary formations created after the invasion