High Quality Content by WIKIPEDIA articles! HMS Queen Mary was a battlecruiser built by the British Royal Navy before World War I, the sole member of her class. She was similar to the Lion-class battlecruisers, though she differed in details from her half-sisters. She was the last battlecruiser completed before the war and participated in the Battle of Heligoland Bight shortly after the war began. As part of the 1st Battlecruiser Squadron, she attempted to intercept a German force that bombarded the North Sea coast of England in December 1914, but was unsuccessful. She was refitting during the Battle of Dogger Bank in early 1915, but participated in the next major fleet action of the war, the Battle of Jutland in mid-1916. She was hit twice by the German battlecruiser Derfflinger during the "Run to the South" and exploded shortly afterwards.