08/15/1857 Proponents of Italian unification, led by soldier and adventurer Giuseppe Garibaldi, form the Italian National Association. (By Brian Bockelman) Source Citation Neville Williams, ed., Chronology of World History, vol. 3 (Santa Barbara, California: ABC-CLIO, 1999), 283. Record Data Date Certainty Exact Type Foreign Relevance Personal People Images Giuseppe Garibaldi, detail