[4] After the invasion of Poland Wambeck (fluent in Polish, known as Maksymilian Wambeck locally)[5] served as SS-Obersturmführer in Chodzież in the Gnesen Gau (Polish Gniezno County) interrogating and torturing Armia Krajowa resistance members.

[4] 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.

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.