Major Events of United States Imperialism By kellymorazan Period: Jan 1, 1895 to Dec 31, 1915 The Imperial Era Aug 28, 1898 Annexation of Hawii Sep 8, 1898 Beginning of the Spanish-American War Mar 26, 1899 Annexation of the Phillipines May 1, 1900 The Boxer Rebellion Nov 8, 1907 Building of the Great White Fleet May 4, 1914 Building of the Panama Canal