In 1830, France underwent the July Revolution, and the Orléanist Louis-Philippe subsequently ascended to the throne; by contrast, the reign of Queen Victoria began in 1837 in a much more peaceful fashion. The major European powers—Russia, Austria, Britain, and to some extent Prussia—were determined to keep France in check, and so France generally pursued a cautious foreign policy. Louis-Phillipe allied with Britain, the country with which France shared the most similar form of government, and its combative Foreign Secretary Lord Palmerston. In Louis-Philippe's first year in power, he refused to annex Belgium during its revolution, instead following the British line of supporting independence. Despite posturings from leading French minister Adolphe Thiers in 1839–1840 that France would protect the increasingly powerful Muhammad Ali of Egypt (a viceroy of the Ottoman Empire), any reinforcements were not forthcoming, and in 1840, much to France's embarrassment, Ali was forced to sign the Convention of London by the powers. Relations cooled again under the governments of François Guizot and Robert Peel. They soured once more in 1846 though when, with Palmerston back as Foreign Secretary, the French government hastily agreed to have Isabella II of Spain and her sister marry members of the Bourbon and Orléanist dynasties, respectively. Palmerston had hoped to arrange a marriage, and "The Affair of the Spanish Marriages" has generally been viewed unfavourably by British historians ("By the dispassionate judgment of history it has been universally condemned"), although a more sympathetic view has been taken in recent years.