Passage: On 18 August 1916, Kronprinz took part in an operation to bombard Sunderland. Admiral Scheer attempted a repeat of the original 31 May plan; the two serviceable German battlecruisers—Moltke and Von der Tann—supported by three dreadnoughts, were to bombard the coastal town of Sunderland in an attempt to draw out and destroy Beatty's battlecruisers. The rest of the fleet, including Kronprinz, would trail behind and provide cover. The British were aware of the German plans and sortied the Grand Fleet to meet them. By 14:35, Admiral Scheer had been warned of the Grand Fleet's approach and, unwilling to engage the whole of the Grand Fleet just eleven weeks after the decidedly close call at Jutland, turned his forces around and retreated to German ports.Kronprinz participated in two uneventful fleet operations, one a month prior on 16 July to the north of Helgoland, and one into the North Sea on 18–20 October. Kronprinz and the rest of III Squadron were sent to the Baltic directly afterward for training, which lasted until 2 November. Upon returning from the Baltic, Kronprinz and the rest of III Squadron were ordered to cover the retrieval of a pair of U-boats that were stranded on the Danish coast. On the return trip, on 5 November 1916, Kronprinz was torpedoed by the British submarine J1 near Horns Reef. The torpedo struck the ship beneath the forward-most gun turret and allowed approximately 250 metric tons (250 long tons; 280 short tons) of water into the ship. Kronprinz maintained her speed and reached port. The following day she was placed in drydock at the Imperial Dockyard in Wilhelmshaven for repairs, which lasted from 6 November to 4 December. During this period, Bernhard Rösing took command of the vessel.After returning to III Squadron, Kronprinz took part in squadron training in the Baltic before conducting defensive patrols in the German Bight. In early 1917, the ship became the flagship of the deputy commander of the squadron, at that time Rear Admiral Karl Seiferling. During training maneuvers on 5...

Question: What happened to Kronprinz during the war?
Kronprinz was torpedoed by the British submarine J1 near Horns Reef.