What happened on23 December?
Karl-Hartwig Siebold(U-554, U-3504)
- More officers
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U-661 operated with the following Wolfpacks during its career:
Pfeil (12 Sep 1942 - 22 Sep 1942) Blitz (22 Sep 1942 - 26 Sep 1942) Wotan (12 Oct 1942 - 15 Oct 1942)