European powers largely regarded these matters as the concern of the United States. Indeed, the nascent Pax Americana was, in essence, abetted by the policy of the United Kingdom, and the preponderance of global sea power which the British Empire enjoyed by virtue of the strength of the Royal Navy. Preserving the freedom of the seas and ensuring naval dominance had been the policy of the British since victory in the Napoleonic Wars. As it was not in the interests of the United Kingdom to permit any European power to interfere in Americas, the Monroe Doctrine was indirectly aided by the Royal Navy. British commercial interests in South America, which comprised a valuable component of the informal empire that accompanied Britain's overseas possessions, and the economic importance of the United States as a trading partner, ensured that intervention by Britain's rival European powers could not engage with the Americas.