After the German invasion of the Soviet Union in June 1941, Vilnius Region became part of the Reichskommissariat Ostland. Since many Polish clergymen joined the anti-Nazi resistance, German Gestapo organized repressions.
After the German invasion of the Soviet Union in June 1941, Vilnius Region was incorporated into the Reichskommissariat Ostland. This led to the persecution of Polish clergymen who were actively resisting Nazi rule.