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 detected and attacked by air patrols; 4 were sunk (, , , and ) and another 4 were damaged (, , and ), forcing them to return to base. A further 3 were damaged, but were able to continue, while 2 more boats arrived from base as reinforcement. On 8/9 October 1943
Rossbach, attacked convoy
SC 143. They sank one ship of and one warship but lost 3 boats (, and ) in the engagement.
Rossbach was disbanded following this attack; the remaining boats formed the core of a new group, codenamed
Schlieffen. ==U-boats involved==