In 1870, Italian troops entered Rome in a final effort to unify Italian-speaking people into one nation, free from foreign rule and under their own central government. This effort had begun in the 1830s and continued through the liberal European revolutions of For the next twenty years, leaders such as di Cavour and Giuseppe Garibaldi negotiated and fought to gain control of territory ruled by Austria, France, and the Catholic Church. By 1866the Italians had gained control of all territories except for the Papal States, which were controlled by the Pope and protected by French troops. When war broke out between the Prussians and the French in 1870the French were forced to tvithdraw their troops from the Papal States, and the Italians gained control of the final territory and completed the unification of Italy (WHICH SENTENCE GIVES AN EXAMPLE OF NATIONALISM ILL GIVE BRAINLIST)