Why was the Allied naval assault of February 1915 so unsuccessful? Did the Ottoman Turks have knowledge of the Allied landings of April 25, 1915? And did Sir Ian Hamilton, the overall commander of the Allied forces at Gallipoli, really make a mistake in his intervention at Suvla? These questions and the key issue of why the Ottoman Turks won the 1915 Gallipoli campaign, or why the Allies lost it, have never been satisfactorily answered. This new history of the Gallipoli campaign finally answers these questions, while also telling the story of what actually happened through the voices of British, Australian, and Turkish soldiers.