The First Lord of the Sea, Sir John Arbuthnot Fisher, can claim to be the true instigator of the battle cruiser in the Royal Navy. These fast and powerfully armed ships were very popular at the start of the First World War. The Battle of the Falklands, which took place in December 1914, proved their effectiveness against armored cruisers, but the Battle of Jutland demonstrated their weaknesses. The sheer speed of these ships and the heavy weaponry that equipped them came at a price: the sacrifice of protection. On the eve of World War II, the Home Fleet had retained three of them, the most powerful. HMS Renown, Repulse and Hood made naval history in letters of blood during a conflict that was no longer theirs. The text describes the genesis, the technical characteristics, as well as the history of these three battle cruisers; 187 photographs, 9 profiles, 3 color profiles, 6 maps and 11 plans complete it perfectly.