In Aarhus, the Gestapo was headed by Eugen Schwitzgebel; the Sicherheitsdienst, led by Obersturmbannführer Lonechun and the Abwehr, commanded by Oberstleutnant Lutze, were also based there.

On 25 August 1944 the unit was established; by September its draftees were transferred to the 47th Infantry Division and the last members left Aarhus on 10 November to fight later on the Western Front.

[4] On 7 October the Gestapo arrested the courier Ruth Phillipsen who worked directly for the leadership of the Jutland resistance.

Bennike finally sent a telegram to his contacts in London, Undergrunden i Jylland er ved at blive revet op af Gestapo […] Jeg beder indtrængende om, at kollegium 4 og 5, må blive ødelagt ved luftangreb.

[4] The attack was planned by members of the British Special Operations Executive and the American Office of Strategic Services.

A training area in 1:1 scale was drawn with chalk, where the pilots picked for the attack made two test runs before the raid.

When the fighters from 315 (Polish) Squadron landed, it was discovered that four of them had broken tailwheels, so it was decided to proceed with just the remaining eight.

[1] The attack force entered Jutland around the coastal town of Henne around 11:20 a.m. and the Germans were alerted at 11:36 a.m. As planned, 315 Squadron broke off around Grove and 140 Wing continued on towards Skanderborg.

Instead of returning to base, another Mosquito escorted it across the Kattegat, where it continued on alone to Sweden, landed safely and was destroyed by the crew before they were apprehended by Swedish authorities.

The rest of the aircraft exited Danish airspace in their designated waves between 12:16 p.m. and 12:34 p.m.; about two hours later, they landed safely in England.

Philipsen got off relatively unscathed but Sandbæk was badly injured and had to receive medical treatment covertly whilst in hiding to recover from his wounds.