Seven Years' War
From Tardis Wiki, the free Doctor Who reference
The Seven Years' War was fought between England and France during the reign of George II. A Slitheen disguised as Sir Edward Scott Cameron described it as a prequel to World War I and "a glorious affair" that "spanned continents" and "consumed countless lives." (AUDIO: Death on the Mile)
Scotland was drawn into the war alongside England by the Act of Union. By 1759, Scotland's best soldiers were fighting the French in Europe. Those that were left on the Scottish home front were compared by the Tenth Doctor to Dad's Army. (PROSE: The Many Hands)