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Pax Britannica (Latin for "the British Peace", modelled after Pax Romana) refers to a period of British imperialism after the 1805 Battle of Trafalgar, which led to a period of overseas British expansionism. The term is derived from, during this period, Europe being relatively peaceful and the British Empire controlling most key naval trade routes and enjoying unchallenged sea power. Britain dominated overseas markets and managed to influence and almost dominate Chinese markets after the Opium Wars.