Many historians describe the First World War as the primary catastrophy of the 20th century. One of the many reasons that led to the outbreak of war, was the maritime arms race between Germany and Britain. Although there was only one great battle between the German High Seas Fleet and the Royal Navy, the navies of all belligerent parties suffered some losses of heavy naval units. However, these were mainly pre-Dreadnought ships, which were deployed in secondary theaters of war. In particular during the battle of the Dardanelles, the French and the British lost a couple of big ships during the campaign. The German submarine warfare and also German mines took their toll as well. This illustrated book is about these ships. It introduces the warships, describes the technical details and is in a certain way also an interesting insight into the battleship classes from 1890 to 1915 of the navies involved. Original pictures are completing the book.