Complex sentence: During the first decades of the Nineteenth Century, the Bourbons gradually lost the support of the Naples Lazzaroni-which was evident in 1860 when Garibaldi arrived in the city at the climax of his campaign for the Unification of Italy.
Split into simpler sentences: During the first decades of the Nineteenth Century, the Bourbons gradually lost the support of the Naples Lazzaroni. This was fully evident by 1860 when Garibaldi arrived in the city at the climax of his campaign for the unification of Italy.