The Chinese War of 1840, in which English ships and men were used to force the opium traffic upon China, was hardly Palmerston's fault, and was begun and conducted by the British diplomatic agents. In 1841 he rendered great service to the cause of international friendship by procuring the European Powers to consent to a convention for the suppression of the Slave Trade, and thus completed the work which had been begun by Wilberforce and Clarkson more than fifty years before. In 1846, after the fall of Peel, he began his second term of office by a refusal to join France and Austria in interfering by force of arms in the internal disorders of Switzerland, and procured a settlement by mediation. This was as wise and temperate a course as could be required. But immediately afterwards he began a series of extraordinary violations of Liberal principle. In July, 1846, he instructed the British Ambassador in Spain to lecture the Spanish Government on its unconstitutional domestic policy, and in order to thwart Louis Philippe of France, meddled with the marriage of the young Queen. In November he sent a fleet to Lisbon to overawe the Portuguese Junta, and re-established the Queen, who had been expelled, on condition of her giving up her absolutism and undertaking to govern with free institutions. In the next year he sent Lord Minto to Italy on a pedagogic tour among the various Governments, bidding them set their houses in order before the prevailing unrest upset them. {212} All this was in the worst possible manner, and love of national freedom was strangely mixed with jealousy of France and Austria. In 1848, the year of Revolutions, when every country in Europe except Russia was disturbed, and even England suffered a final and sporadic outbreak of Chartism, Palmerston indulged his love of freedom to the full. Neither he nor Lord John Russell concealed their sympathy with the Poles, the Hungarians, and the Italians, and while they declined to join in Continental wars, they upheld the Sultan in his refusal to give up Hungarian refugees to Austria and Russia. No Liberal could find much cause for complaint in this sympathetic policy, even though it incurred the hostility of reactionary Governments. Contrasted with Russia assisting Austria to put down the Hungarians, and with the French Republic helping Austria to destroy the Republic of Rome, England at this time appeared conspicuously magnanimous. But in 1851 Palmerston's gay pugnacity led him into a gross blunder.