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In page Crimean War:

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Napoleon III responded with a show of force by sending the ship of the line Charlemagne to the Black Sea and thereby violated the London Straits Convention.[5][2] The gunboat diplomacy show of force, together with money[citation needed], induced Ottoman Sultan Abdülmecid I to accept a new treaty confirming France and the Catholic Church's supreme authority over Christian holy places, including the Church of the Nativity, which had been held by the Greek Orthodox Church.[6]