On May 31, 1916, the largest naval battle in world history took place. In the North Sea, the British Grand Fleet and the German High Seas Fleet came together in a deadly battle. Perhaps the most important heroes of the battle were the battlecruisers Lyon, Princess Royal, Queen Mary and Tiger. Previously disparagingly nicknamed "Admiral Fisher's cats," they bore the brunt of the Battle of Dogger Bank and the Battle of Jutland. This book restores the history of the creation, peaceful service and combat use of some of the most advanced ships of the British fleet, which became the first superdreadnoughts among battlecruisers and forever entered their names in the history of wars.