quality:corruption, structural:summarization
Battle of Sinop

The European powers continued to pursue diplomatic avenues. The representatives of the four Great Powers (the United Kingdom, France, Austria and Prussia) met in Vienna, where they drafted a note, which they hoped would be acceptable to both the Russians and the Ottomans. The peace terms arrived at by the four powers at the Vienna Conference (1853) were delivered to the Russians by Austrian Foreign Minister Count Karl von Buol on 5 December 1853. The note met with the approval of Nicholas I, but Abdülmecid I rejected the proposal since he felt that the document's poor phrasing left it open to many different interpretations. The United Kingdom, France and Austria united in proposing amendments to mollify the Sultan, but the court of St. Petersburg ignored their suggestions. The United Kingdom and France then set aside the idea of continuing negotiations, but Austria and Prussia did not believe that the rejection of the proposed amendments justified the abandonment of the diplomatic process.

On 23 November, a small Russian naval force discovered the Ottoman fleet harboured in Sinop and began a blockade. Once the Russian blockade was reinforced, a squadron of 6 Russian ships of the line supported by 5 smaller warships, assaulted the harbour on 30 November 1853. During Battle of Sinop, the Russian squadron destroyed a patrol squadron of 11 Ottoman warships—mostly frigates—while they were anchored in port under defence of the onshore artillery garrison. The Ottoman fleet suffered a crushing defeat. The Russian victory in the naval battle in Sinope was called "the massacre of Sinope". Although Russia and the Ottoman Empire were already at war, and there was no evidence of Russian atrocities, the phrase was used as propaganda in the West. The press in both United Kingdom and France used Sinop as the casus belli ("cause of war") to shape the public opinion in favour of war against Russia. By 28 March 1854, after Russia ignored an Anglo-French ultimatum to withdraw from the Danubian Principalities, the United Kingdom and France had both declared war.