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ANSWER
The Revolutionary War.
Royal Pioneer Corps ended in 1993.
Royal Flying Corps ended in 1918.
Royal Colony of North Carolina ended in 1776.
Royal Ordnance Factories F.C. ended in 1896.
Royal Army Service Corps ended in 1965.
Duke of Wellington's Regiment ended in 2006.
Royal Aquarium ended in 1907.
Royal Enfield ended in 1971.
The Royal Magazine ended in 1939.
Royal Teens ended in 1965.
Royal Trux ended in 2001.
Grand Royal ended in 2001.
Royal Show ended in 2009.
Café Royal ended in 2008.
Royal Suédois ended in 1814.
Royal Aviation ended in 2001.
Royal Gigolos ended in 2008.