allies during wartime. With the Straits Convention, the Russian Emperor Nicholas I abandoned the idea of reducing the Sultan to a state of dependence, and returned to the plan of partitioning Ottoman territories in Europe. Thus, after the resolution of the Egyptian struggle which had begun in 1831, the weak Ottoman Empire was no longer wholly dependent on Russia but was dependent on the Great Powers for protection. Attempts at internal reform failed to end the decline of the Empire. By the 1840s, the Ottoman Empire had become the "sick man of Europe", and its eventual dissolution appeared inevitable. Revolutions of 1848 After the Great Powers reached a compromise to end the revolt of Mehmet Ali, the Eastern question lay dormant for about a decade until revived by the Revolutions of 1848. Although Russia could have seized the opportunity to attack the Ottoman Empire—France and Austria were at the time occupied by their own insurrections—it chose not to. Instead, Emperor Nicholas committed his troops to the defence of Austria, hoping to establish goodwill to allow him to seize Ottoman possessions in Europe later. After the Austrian Revolution was suppressed, an Austro-Russian war against the Ottoman Empire seemed imminent. The Emperors of both Austria and Russia demanded that the Sultan return Austrian rebels who had sought asylum in the Empire, but he refused. The indignant monarchs withdrew their ambassadors to the Sublime Porte, threatening armed conflict. Almost immediately, however, Britain and France sent their fleets to protect the Ottoman Empire. The two Emperors, deeming military hostilities futile, withdrew their demands for the surrender of the fugitives. The short crisis created a closer relationship between Britain and France, which led to a joint war against Russia in the Crimean War of 1853–56. Crimean War A new conflict began during the 1850s with a religious dispute. Under treaties negotiated during the 18th century, France was the guardian of Roman Catholics in the Ottoman Empire, while Russia was the protector of Orthodox Christians. For several years, however, Catholic and Orthodox monks had disputed possession of the Church of the Nativity and the Church of the Holy Sepulchre in Palestine. During the early 1850s, the two sides made demands which the Sultan could not possibly satisfy simultaneously. In 1853, the Sultan adjudicated in favour of the French, despite the vehement protestations of the local Orthodox monks. Emperor Nicholas of Russia dispatched Prince Menshikov on a