The Battle of Sinop, or the Battle of Sinope, was a Russian naval victory over the Ottoman Empire during the Crimean War that took place on 30 November 1853 at Sinop, a sea port in northern Anatolia, when a squadron of Imperial Russian warships struck and defeated a squadron of Ottoman ships anchored in the harbor. The battle was a contributing factor to bringing France and Great Britain into the conflict. It is commemorated in Russia as a Day of Military Honour.