Complex sentence: She visited the United States in 1870 when the city was overtaken by Giuseppe Garibaldi's forces, then returned to Rome for one year before moving back to the United States in 1871 and then exhibited of Haitian leader Toussaint Louverture in Boston.
Split into simpler sentences: She visited the United States in 1870 when the city was overtaken by Giuseppe Garibaldi's forces. She then returned to Rome for one year before moving back to the United States in 1871 and then exhibited of Haitian leader Toussaint Louverture in Boston.