Wolfpacks U-997 was part of
U-997 operated with the following Wolfpacks during its career:
Grimm (31 May 1944 - 6 Jun 1944)
Trutz (17 Aug 1944 - 1 Sep 1944)
Grimm (13 Sep 1944 - 1 Oct 1944)
Regenschirm (14 Oct 1944 - 16 Oct 1944)
Panther (16 Oct 1944 - 8 Nov 1944)
Stier (21 Nov 1944 - 25 Dec 1944)
Hagen (15 Mar 1945 - 21 Mar 1945)