Seewolf was formed in March 1945 in an effort to re-establish the U-boat offensive in American waters; it was the last wolfpack of the Atlantic campaign. 7 of the 9 boats that sailed to Americas were in Seewolf; another 2 sailed independently. Seewolf boats had one success; U-546 sank USS Frederick C. Davis, shortly before she herself was sunk. The fifth boat U-881 was detected and destroyed on 6 May 1945, the last boat in American waters to be destroyed. The 2 boats in transit when Germany surrendered were given up to the USN on 8 May 1945.