HMS Indomitable was an Invincible-class battlecruiser of the British Royal Navy. She was built before World War I and had an active career during the war. She tried to hunt down the German ships Goeben and Breslau in the Mediterranean when war broke out and bombarded Turkish fortifications protecting the Dardanelles even before the British declared war on Turkey. She helped to sink the German armoured cruiser Blücher during the Battle of Dogger Bank in 1915 and towed the damaged British battlecruiser HMS Lion to safety after the battle. She damaged the German battlecruisers Seydlitz and Derfflinger during the Battle of Jutland and watched her sister HMS Invincible explode. She was deemed obsolete after the war and was sold for scrap in 1921, and scrapped by 1923 in Dover.