German battleship Gneisenau

Gneisenau (German pronunciation: [ˈɡnaɪ̯zənaʊ̯]) was a German capital ship, alternatively described as a battleship and battlecruiser, of Nazi Germany's Kriegsmarine. She was the second vessel of her class, which included her sister ship, Scharnhorst. The ship was built at the Deutsche Werke dockyard in Kiel; she was laid down on 6 May 1935 and launched on 8 December 1936. Completed in May 1938, the ship was armed with a main battery of nine 28 cm (11 in) C/34 guns in three triple turrets. Plans were approved, once construction had started, to replace these weapons with six 38 cm (15 in) SK C/34 guns in twin turrets, but as this would involve a lot of redesign, construction continued with the lower calibre guns. The intent was to make the upgrade in the winter of 1940–41, but the outbreak of World War II stopped this.

Gneisenau and Scharnhorst operated together for much of the early portion of World War II, including sorties into the Atlantic to raid British merchant shipping. During their first operation, the two ships sank the British auxiliary cruiser HMS Rawalpindi in a short battle. Gneisenau and Scharnhorst participated in Operation Weserübung, the German invasion of Norway. During operations off Norway, the two ships engaged the battlecruiser HMS Renown and sank the aircraft carrier HMS Glorious. Gneisenau was damaged in the action with Renown and later torpedoed by a British submarine, HMS Clyde, off Norway. After a successful raid in the Atlantic in 1941, Gneisenau and her sister put in at Brest, France. The two battleships were the subject of repeated bombing raids by the RAF; Gneisenau was hit several times during the raids, though she was ultimately repaired.

In early 1942, the two ships made a daylight dash up the English Channel from occupied France to Germany. After reaching Kiel in early February, the ship went into drydock. On the night of 26 February, the British launched an air attack on the ship; one bomb penetrated her armored deck and exploded in the forward ammunition magazine, causing serious damage and many casualties. The repairs necessitated by the damage were so time-consuming that it was determined to rebuild the ship to replace the nine 28 cm guns with six 38 cm guns in double turrets. The 28 cm guns were removed and used as shore batteries. In 1943, Hitler ordered the cessation of conversion work, and on 27 March 1945, she was sunk as a blockship in Gotenhafen (Gdynia) in German-occupied Poland. She was eventually broken up for scrap in 1951.