Wolfpacks U-221 was part of
U-221 operated with the following Wolfpacks during its career:
Pfeil (12 Sep 1942 - 22 Sep 1942)
Blitz (22 Sep 1942 - 26 Sep 1942)
Tiger (26 Sep 1942 - 30 Sep 1942)
Wotan (5 Oct 1942 - 18 Oct 1942)
Draufgänger (29 Nov 1942 - 9 Dec 1942)
Neuland (8 Mar 1943 - 13 Mar 1943)
Dränger (14 Mar 1943 - 20 Mar 1943)
Drossel (11 May 1943 - 15 May 1943)
Oder (17 May 1943 - 19 May 1943)
Mosel (19 May 1943 - 24 May 1943)
Trutz (1 Jun 1943 - 16 Jun 1943)
Trutz 3 (16 Jun 1943 - 29 Jun 1943)