 The sole pocket battleship raider, "Admiral Graf Spee", had been stopped at the Battle of the River Plate by an inferior and outgunned British squadron.From the summer of 1940 a small but steady stream of warships and armed merchant raiders set sail from Germany for the Atlantic.The power of a raider against a convoy was demonstrated by the fate of convoy HX 84 attacked by the pocket battleship on 5 November 1940.