History project By connormurphhy 1823 The Monroe doctrine is issued by James Monroe 1867 America wanted to expand the country through imperialism 1867 America buys Alaska from Russia for $7.2million 1868 Cuba rebelled against Spain 1898 America builds a naval base at Pearl Harbor in Hawaii 1898 America annexed Hawaii and it joins the U.S. Apr 21, 1898 U.S.S Maine explodes in Cuba and the Spanish-American War started Dec 10, 1898 The U.S. and Spain meet in Paris and form a treaty 1899 The Phillipine-American war starts 1900 The Boxer rebellion kills hundreds of European missionaries in China 1901 Teddy Roosevelt goes into office as the U.S. president 1901 The Platt Amendment Starts between the U.S. and Cuba Jul 4, 1902 The Phillipine-American war ends and the Phillipines become independent Nov 3, 1903 Panama gains independence from Columbia with the help of the U.S. Aug 15, 1914 Panama Canal opens 1917 The U.S. grants Puerto Rico citizenship