Rossbach was formed in October 1943 to operate against the North Atlantic convoy routes and comprised 21 boats. It consisted of 12 boats from the disbanded group Leuthen, plus 9 others from bases in France and Germany.
Whilst forming, several boats from Rossbach were found and attacked by air patrols; 4 were sunk (U-221, U-279, U-389,and U-336) and another 4 were damaged (U-260, U-305, U-666 and U-731), forcing them to return to base. A further 3 were damaged, but were able to continue, while 2 more boats arrived from base as re-inforcement.
Rossbach was disbanded following this attack; the remaining boats formed the core of a new group, codenamed Schlieffen.
- Helgason, Guðmundur. "Wolfpack Rossbach". German U-boats of WWII - uboat.net.