At ten o'clock in the morning of February 25, 1915, the Queen Elizabeth, Gaulois, Irresistible, and Agamemnon began to fire on the forts Sedd-el-Bahr, Orkanieh, Kum Kale, and Cape Hellas—the outer forts—at long range, and drew replies from the Turkish guns. It was out of all compliance with naval tradition for warships to stand and engage land fortifications, for lessons learned by naval authorities from the Spanish-American and Russo-Japanese wars had established precedents which prohibited it. But here the larger warships were carrying heavier guns than those in the forts. Whereas the Queen Elizabeth carried 15-inch guns, the largest of the Turkish guns measured only 10.2 inches.

At 11.30 o'clock in the morning of February 25, 1915, the Agamemnon was hit with a shell which had traveled six miles, but it did not damage her beyond repair. Meanwhile the Queen Elizabeth had silenced Cape Hellas, firing from a distance far beyond the range of the forts' guns. And then, just before noon, and after the larger ship had silenced the main battery at Cape Hellas, the ships Vengeance and Cornwallis dashed in at shorter range and destroyed the minor batteries there. The Suffren and Charlemagne also took part in this phase of the engagement, and later, in the afternoon, the Triumph and Albion concentrated fire on Sedd-el-Bahr, silencing its last guns by five o'clock in the evening.

The larger ships needed the respite during the night of February 25, 1915, while trawlers, which had been brought down from the North Sea for the purpose, began to sweep the entrance to the forts for mines, and cleared enough of them out by the morning of the 26th to enable the Majestic—which had by then joined the fleet—and the Albion and Vengeance to steam in between the flanking shores and fire at the forts on the Asiatic side. It was known by the allied commanders that they might expect return fire from Fort Dardanos, but this they did not fear, for they knew that its heaviest gun measured but 5.9 inches. But they had a surprise when concealed batteries near by, the presence of which had not been suspected, suddenly began to fire. Believing now that the Turks were abandoning the forts at the entrance, the allied ships covered the landing of parties of marines.

Long-range firing had by the end of February 26, 1915, enabled the allied fleets to silence the outer forts and to clear their way to the straits. They now had to take up the task of destroying the real defenses of the Dardanelles—the forts at the Narrows, and this was a harder task, for long-range firing was no longer possible. The guns of the forts and those of the ships would be meeting on a more equal basis.

But this was not to be essayed at once, for more rough weather kept the fleets from using their guns effectively, their trawlers continued to sweep the waters for mines near the Narrows. By March 3, 1915, however, the commanders were ready to resume operations. The Lord Nelson and the Ocean had by then also arrived on the scene, and in the subsequent operations were hit a number of times by the Turkish guns; and the Canopus, Swiftsure, Prince George, and Sapphire, though they did not report being hit, were also known to have been present.

The new "eyes" of the fleets located new and concealed batteries placed in position by the Turks, and at two o'clock in the afternoon of February 3, 1915, they ascended to direct the fire of the ships' guns by signal. The bombardment was kept up till darkness fell, but it was resumed on the next day.

On March 4, 1915, the Queen Elizabeth, so great was the range of her guns, was able to reach the forts Hamadieh I, Tabia, and Hamadieh II, firing across the Gallipoli Peninsula. Three times she was hit by shells from field pieces lying between her and her target, but no great damage was done to her. While her guns roared out, the Suffren, Albion, Prince George, Vengeance, and Majestic went inside the straits and had attacked the forts at Soundere, Mount Dardanos, and Rumili Medjidieh Tabia, and were fired upon by Turkish guns from the forts and from concealed batteries which struck these ships, but not a man was killed or a ship put out of action.

March 7, 1915, the Agamemnon and Lord Nelson attacked the forts at the Narrows, their bombardment being covered by the four French battleships. All of the ships were struck, but again none of them was put out of action. After heavy shelling forts Rumili Medjidieh Tabia and Hamadieh I were silenced.

While these operations were going on, another British fleet, consisting of battleships and cruisers, on March 5, 1915, began an attack on Smyrna. For two hours, and in fine, clear weather, Fort Yeni Kale was damaged after being subjected to heavy bombardment, but it was not silenced when dusk interrupted the attack.

Little was accomplished for some days afterward. Some of the forts which had been reported silenced were getting ready to resume firing; their silence had been due to the fact that the defenders often had to leave their guns while the gases generated by the firing cleared off, and they had also thought it wiser to conserve ammunition rather than fire-ineffective shots. Sedd-el-Bahr and Kum Kale were able to resume firing in a few days, for though the shells of the allied fleets had damaged the structural parts of these defenses, they had not landed troops out to occupy them, with the result that the Turks were enabled to intrench near the ruins and there reset their guns.