Battle of Jutland

Maps showing the maneuvers of the British (blue) and German (red) fleets on 30–31 May 1916

In May 1916, Admiral Reinhard Scheer, the fleet commander, planned to lure a portion of the British fleet away from its bases and destroy it with the entire High Seas Fleet. Pillau remained in II Scouting Group, attached to I Scouting Group, for the operation. The squadron left the Jade roadstead at 02:00 on 31 May, bound for the waters of the Skagerrak. The main body of the fleet followed an hour and a half later.^[7] Shortly before 15:30, the opposing cruiser screens engaged; Elbing was the first German cruiser to encounter the British. Pillau and Frankfurt steamed to assist, and at 16:12 they began firing on HMS Galatea and Phaeton at a range of 16,300 yards (14,900 m). As the British ships turned away, the German shells fell short, and at 16:17, Pillau and Frankfurt checked their fire.^[8] About fifteen minutes later, the three cruisers engaged a seaplane launched by the seaplane tender HMS Engadine. They failed to score any hits, but the aircraft was forced off after which its engine broke down and it was forced to land. The three cruisers then returned to their stations ahead of the German battlecruisers.^[9]

Shortly before 17:00, the British 5th Battle Squadron had arrived on the scene, and at 16:50 they spotted Pillau, Elbing, and Frankfurt. Eight minutes later, the powerful battleships HMS Warspite and Valiant opened fire at Pillau at a range of 17,000 yards (16,000 m). Several salvos fell close to the German cruisers, prompting them to lay a cloud of smoke and turn away at high speed. About an hour later, the German battlecruisers were attacked by the destroyers Onslow and Moresby, but Pillau, Frankfurt, and the battlecruisers' secondary guns drove them off.^[10] At around 18:30, Pillau and the rest of II Scouting Group encountered the cruiser HMS Chester; they opened fire and scored several hits on the ship. As both sides' cruisers disengaged, Rear Admiral Horace Hood's three battlecruisers intervened. His flagship HMS Invincible scored a hit on Wiesbaden that exploded in her engine room and disabled the ship.^[11] Pillau was also hit by a 12 in (300 mm) shell from HMS Inflexible. The shell exploded below the ship's chart house; most of the blast went overboard, but the starboard air supply shaft vented part of the explosion into the second boiler room. All six of the ship's coal-fired boilers were temporarily disabled, though she could still make 24 kn (44 km/h; 28 mph) on her four oil-fired boilers, allowing her to escape under cover of heavy fog. By 20:30, three of the six boilers were back in operation, allowing her to steam at 26 kn (48 km/h; 30 mph).^[12]

At around 21:20, II Scouting Group again encountered the British battlecruisers. As they turned away, Pillau briefly came under fire from the battlecruisers, though to no effect. HMS Lion and Tiger both fired salvos at the ship before turning their attention to the battlecruiser SMS Derfflinger; Pillau's official record states that the British shooting was very inaccurate. Pillau and Frankfurt spotted the cruiser Castor and several destroyers shortly before 23:00. They each fired a torpedo at the British cruiser before turning back toward the German line without using their searchlights or guns to avoid drawing the British toward the German battleships.^[13] By 04:00 on 1 June, the German fleet had evaded the British fleet and reached Horns Reef.^[14] At 09:30, Pillau was detached from the fleet to assist the crippled battlecruiser Seydlitz, which was having trouble navigating back to port. Pillau steamed ahead of Seydlitz to guide her back to Wilhelmshaven, but shortly after 10:00, the battlecruiser ran aground off Sylt. After freeing Seydlitz at 10:30, the voyage back resumed, with a division of minesweepers steaming ahead testing the depth to prevent another grounding. Seydlitz continued to take on water and sink lower in the water; she turned around and steamed in reverse in an attempt to improve the situation. Pillau also attempted to tow the battlecruiser, but was unable because the line repeatedly snapped. A pair of pumping steamers arrived in the evening, and slow progress was made through the night, with Pillau still guiding the voyage. The ships reached the outer Jade lightship at 08:30 and anchored twenty minutes later. In the course of the engagement, Pillau had fired 113 rounds of 15 cm ammunition and four 8.8 cm shells. She also launched one torpedo. Her crew suffered four men killed and twenty-three wounded.^[15]

Later service

In July 1917, a series of mutinies occurred on several ships of the fleet, including Pillau. While the ship was in harbor in Wilhelmshaven on the 20th, a group of 137 men left the ship to protest a cancellation of their leave. After a couple of hours in the town, the men returned to the ship and began to complete the tasks they had been ordered to do that morning as a show of good will. Pillau's commander did not take the event seriously, and ordered a limited punishment for the crewmen who had staged the protest.^[16] By late 1917, Pillau had been assigned to IV Scouting Group, along with Stralsund and Regensburg. In late October 1917, IV Scouting Group steamed to Pillau, arriving on the 30th. They were tasked with replacing the heavy units of the fleet that had just completed Operation Albion, the conquest of the islands in the Gulf of Riga, along with the battleships of the I Battle Squadron. The risk of mines that had come loose in a recent storm, however, prompted the naval command to cancel the mission, and Pillau and the rest of IV Scouting Group was ordered to return to the North Sea on 31 October.^[17]

Upon returning the North Sea, Pillau returned to II Scouting Group. On 17 November, the four cruisers of II Scouting Group, supported by the battleships Kaiser and Kaiserin, covered a minesweeping operation in the North Sea. They were attacked by British cruisers, supported by battlecruisers and battleships, in the Second Battle of Heligoland Bight. Königsberg, II Scouting Group flagship, was damaged in the engagement, but the four cruisers managed to pull away from the British, drawing them toward the German dreadnoughts. They in turn forced the British to break off the attack; neither side had significant success in the operation. Pillau emerged from the battle unscathed.^[18] On 23–24 April 1918, the ship participated in an abortive fleet operation to attack British convoys to Norway. I Scouting Group and II Scouting Group, along with the Second Torpedo-Boat Flotilla were to attack a heavily guarded British convoy to Norway, with the rest of the High Seas Fleet steaming in support. The Germans failed to locate the convoy, which had in fact sailed the day before the fleet left port. As a result, Scheer broke off the operation and returned to port.^[19]

In October 1918, Pillau and the rest of II Scouting Group were to lead a final attack on the British navy. Pillau, Cöln, Dresden, and Königsberg were to attack merchant shipping in the Thames estuary while Karlsruhe, Nürnberg, and Graudenz were to bombard targets in Flanders, to draw out the British Grand Fleet.^[20] Admirals Scheer and Franz von Hipper intended to inflict as much damage as possible on the British navy, in order to secure a better bargaining position for Germany, whatever the cost to the fleet. On the morning of 29 October 1918, the order was given to sail from Wilhelmshaven the following day. Starting on the night of 29 October, sailors on Thüringen and then on several other battleships mutinied. The unrest ultimately forced Hipper and Scheer to cancel the operation.^[21]

World War II

Wreck of Bari in Livorno, summer 1944

By the outbreak of World War II in September 1939, her armament had been increased by six 20 mm (0.79 in) guns and six 13.2 mm (0.52 in) machine guns.^[24] She was activated for combat duty in 1940, when she became the flagship of the Forza Navale Speciale (Special Naval Force) during the Greco-Italian War. She supported the invasion of the island of Cephalonia and later shelled Greek positions in mainland Greece. Following the German intervention in April 1941 and Greece's defeat, Bari was tasked with escorting convoys from Italy to occupied Greek ports.^[23] In the meantime, Italy had entered the wider World War in June 1940. In 1942, Italy planned to invade the island of Malta, and Bari and Taranto were to lead the landing force, but the operation was called off. In November that year, she served as the flagship of the amphibious force that landed at Bastia in Corsica. She took part in anti-partisan bombardments off the Montenegrin coast later that year.^{[27] [28]} That year, she was based in Livorno, where she was placed in reserve in January 1943.^[23]

In early 1943, she was slated for conversion to an anti-aircraft ship. She was to be rearmed with six 90 mm (3.5 in) /50 guns, eight 37 mm (1.5 in) guns, and eight new model 20 mm /65 or /70 machine guns. The work would have required significant resources, and work had not yet begun by 28 June, when American bombers badly damaged Bari at Livorno and she sank in shallow water two days later.^[23][24] At the Italian armistice in September 1943, she was further damaged to render her useless to the German occupiers.^[28] The wreck was partially scrapped by the Germans in 1944. She was officially removed from the navy list on 27 February 1947, and raised on 13 January 1948 for scrapping.^[24]