of bombarding German submarine bases on the coast of Belgium, and was based at Portland, although it transferred to Dover immediately on 14 November. However, due a lack of antisubmarine defenses at Dover, the squadron returned to Portland on 19 November. The 6th Battle Squadron returned to Dover in December. Cornwallis was detached from the squadron in late December and assigned to West Ireland, where she was based at Clew Bay and Killarney Bay. She remained there until January 1915. Dardanelles campaign In January 1915, Cornwallis was ordered to the Dardanelles to participate in the Dardanelles campaign against the Ottoman Empire. She departed Portland on 24 January 1915 and arrived at Tenedos to join the British Dardanelles Squadron under Admiral Sackville Carden on 13 February 1915. Cornwallis was one of six British and French battleships selected to lead the first attack on the straits on 19 February, under the operational control of Vice Admiral John de Robeck. The operational plan called for Cornwallis to suppress the Ottoman "Orkanie" coastal battery. At 09:51 on 19 February, Cornwallis fired the first shots of the Dardanelles campaign when she began her bombardment of the "Orkanie" battery, but her time on station was cut short when a defective capstan prevented her from dropping anchor. The Ottomans had not returned fire, so de Roebeck ordered his ships to anchor in place to improve their accuracy. Cornwallis was therefore replaced by the battleship Vengeance; she instead was tasked with acting as a spotter for the battleship and the battlecruiser . Later in the day, around 15:00, Cornwallis and Vengeance joined the French battleship as it attacked the fortress at Kumkale at close range; at the same time, she used her 6-inch guns to attack the "Helles" battery. About an hour and a half later, the Ottoman coastal guns finally began to engage the Anglo-French fleet, and Cornwallis came under fire but was unscathed. By 17:20, with the setting sun beginning to silhouette his ships, Carden ordered the fleet to break off the attack and withdraw. A second attack began on 25 February; de Roebeck, aboard Vengeance, was to lead the assault in company with Cornwallis, followed by the French Admiral Émile Paul Amable Guépratte with Suffren and . These four battleships attacked the defences at close range, while several other battleships shelled them at longer range to suppress the Ottoman gun crews. The other ships began