Group 13

The Group 13 network (Polish: Trzynastka, Yiddish: דאָס דרײַצענטל) was a Jewish collaborationist organization in the Warsaw Ghetto during the German occupation of Poland in World War II.

The rise and fall of the Group was likely a proxy for power struggles between various factions in the German military and bureaucracy, for their own financial benefit.

[6] In July 1941, Group 13 lost its political status to the Judenrat, and the Office to Combat Usury and Profiteering was taken over by the Jupo police force.

[5] In mid-1941, shortly before the Office was closed, there was a split in the Group leadership, when Morris Kohn and Zelig Heller broke with Gancwajch and established their own organizations.

[1] Gancwajch and surviving members of the group later re-emerged posing as Jewish underground fighters, though in reality they were hunting for Poles in hiding or supporting other Nazi collaborationists.