HMS Hood was the largest warship in the world when it was commissioned in 1920 and held this title for 20 years. At over 860 feet long and with a displacement of more than 42,000 tons, it was a symbol of British imperial power throughout the interwar period. A symbol of power: Nicknamed "The Mighty Hood," the battlecruiser was a prominent symbol of the Royal Navy and its strength around the world. A unique class: It was the only ship of the Admiral-class battlecruisers to be completed, as the ot