After 1812 he became a diplomat, and in 1813, at age 29, was given the critically important embassy to Vienna, where he organized and financed the sixth coalition that defeated Napoleon. His rise in politics was equally rapid and lucky, and "two accidents — Canning's death and Wellington's impulsive acceptance of the Canningite resignations" led to his becoming Foreign Secretary for Prime Minister Wellington in 1828 despite "an almost ludicrous lack of official experience"; he had been a minister for less than six months. After holding the position for two years, followed by another cabinet role, by 1841 his experience led to his appointment as Foreign Secretary again under Robert Peel for a longer term. His diplomatic successes include organizing the coalition against Napoleon in 1812–1814, normalizing relations with post-Napoleonic France, settling the old border dispute between Canada and the United States, and ending the First Opium War with China in 1842, whereby Hong Kong was obtained. Aberdeen was a poor speaker, but this scarcely mattered in the House of Lords. He exhibited a "dour, awkward, occasionally sarcastic exterior". His friend William Ewart Gladstone, said of him that he was "the man in public life of all others whom I have . I say emphatically . I have others, but never like him".