How did Italy gain and then lose power on an international level?

Present-day Italy became a sovereign state on March 17, 1861, during the Resurgence, a political movement that unified countries of the Italian Peninsula into a single nation of Italy. During the reign of the Roman Empire, the Italian Peninsula was among the imperial provinces under the rule of the Romans.

Explanation:

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the nationalists wanted a strong central government so the new country wouldn't fall apart.

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