Wolfpacks U-668 was part of
U-668 operated with the following Wolfpacks during its career:
Grimm (31 May 1944 - 6 Jun 1944)
Trutz (17 Aug 1944 - 26 Aug 1944)
Schwefel (22 Sep 1944 - 25 Sep 1944)
Zorn (26 Sep 1944 - 1 Oct 1944)
Grimm (1 Oct 1944 - 2 Oct 1944)
Panther (16 Oct 1944 - 10 Nov 1944)
Stier (25 Nov 1944 - 18 Dec 1944)
Hagen (17 Mar 1945 - 21 Mar 1945)