have they participated in any wars?
Yes - World War I and World War II
Royal Navy
During the First World War, the Royal Navy's strength was mostly deployed at home in the Grand Fleet, confronting the German High Seas Fleet across the North Sea. Several inconclusive clashes took place between them, chiefly the Battle of Jutland in 1916.. The British fighting advantage proved insurmountable, leading the High Seas Fleet to abandon any attempt to challenge British dominance. In the inter-war period, the Royal Navy was stripped of much of its power. The Washington and London Naval Treaties imposed the scrapping of some capital ships and limitations on new construction. In 1932, the Invergordon Mutiny took place over a proposed 25% pay cut, which was eventually reduced to 10%. International tensions increased in the mid-1930s and the re-armament of the Royal Navy was well under way by 1938. In addition to new construction, several existing old battleships, battlecruisers and heavy cruisers were reconstructed, and anti-aircraft weaponry reinforced, while new technologies, 
what is the scientific name of emu? Dromaius novaehollandiae what is its conservation status? Least concern what does it feed on? Plants as "Acacia", "Casuarina" and grasses; insects which genus does it belong to? Dromaius how is the name formed? From two generic names - Dromiceius, Dromaius where are they mostly found? Australia who described it first? Arthur Phillip who is he? English Royal Navy officer and the first Governor of New South Wales when is the former institution formed? 1546 where is it headquartered? There are various headquarters - Navy Command Headquarters based at in Portsmouth; Northwood Headquarters, at Northwood, London
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Royal Navy [SEP] World Wars
During the First World War, the Royal Navy's strength was mostly deployed at home in the Grand Fleet, confronting the German High Seas Fleet across the North Sea. Several inconclusive clashes took place between them, chiefly the Battle of Jutland in 1916.. The British fighting advantage proved insurmountable, leading the High Seas Fleet to abandon any attempt to challenge British dominance. In the inter-war period, the Royal Navy was stripped of much of its power. The Washington and London Naval Treaties imposed the scrapping of some capital ships and limitations on new construction. In 1932, the Invergordon Mutiny took place over a proposed 25% pay cut, which was eventually reduced to 10%.