 Only four Junkers Ju 290s and 10 modified Ju 88H aircraft were made available before the defeat of U-boats in Black May.In a notable success, the battleships "Scharnhorst" and "Gneisenau" and the cruiser "Prinz Eugen" completed a raiding sortie into the Atlantic Ocean.Trapped in the port of Brest, France, they came under air attack from RAF Bomber Command.