American Imperialism By mc025784 1867 Purchase of Alaska for $7.2 million 1878 Treaty with Samoa marks beginning of U.S. expansion in pacific 1890 Mayan publishes The Influence of Sea Power upon History 1660-1783 1898 USS Maine explodes and sinks in Havana harbor 1898 Spain and the U.S. declare war on each other over Cuba 1898 Dewey occupies Manila 1898 Hawaii annexed to U.S. 1898 Treaty of Paris adds Puerto Rico, Guam, and Phillipines to U.S., and guarantees Cuban independence. 1899 Anti-Imperialism League founded 1899 U.S. declares Open Door Policy toward China 1900 Boxer rebellion suppressed in China 1901 Theodore Roosevelt becomes president 1902 Filipino military resistance to U.S. occupation ends 1903 With U.S. help, Panama declares independence from Columbia, U.S. purchases Canal zone 1905 Roosevelt mediates settlement to Russo-Japanese War 1907 "Gentleman's Agreement" between Japan and U.S. 1912 Wilson elected president 1912 U.S. troops in various Carribean countries 1914 Archduke Ferdinand assassination, WW1 erupts 1914 Panama Canal Opens