Chief Minister Cavour was neither a revolutionary nor a democrat. He was a skilled diplomat from the wealthy Italian elite who spoke French better than Italian. Through a tactful diplomatic alliance with France, he helped Sardinia-Piedmont defeat Austrian forces in 1859, playing a crucial role in the unification of Italy under King Victor Emmanuel II in 1861.
Source: Chapter 1, Section on Nationalism in Europe
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The examiner expects you to mention two key points: (1) Cavour's character — not a revolutionary/democrat, a diplomat from the elite; and (2) his key action — the Franco-Sardinian alliance that defeated Austria. Avoid writing about Garibaldi or Mazzini in detail, as the question is specifically about Cavour. Stick to the passage; don't over-explain.