1890-1899 By ushistorya4 Period: Jan 1, 1890 to Dec 31, 1899 1890-1899 Jun 12, 1895 United States President Cleveland releases a proclamation of neutrality in the Cuban Insurrection. Feb 28, 1896 United States recognizes that the Cubans are at war. Mar 4, 1897 William McKinley is inaugurated. Mar 7, 1897 Theodore Roosevelt was appointed assistant U.S. Secretary of the Navy. Jan 1, 1898 Spain grants Cuba limited autonomy. Feb 15, 1898 U.S.S Maine explodes in Havana Harbor. Mar 29, 1898 The United States demanded that Spain terminates its presence in Cuba. Apr 1, 1898 Spain denies American ultimatum to leave Cuba. Apr 10, 1898 President McKinley requests approval from Congress to intervine in Cuba to put a stop to the war going on between Cuba and Spain. Apr 13, 1898 Congress accepts McKinley's request to assist Cuba without consent from Cuban government. Apr 20, 1898 President McKinley signed the Joint Resolution for war with Spain and the ultimatum was later sent to Spain. Apr 25, 1898 War was formally declared between the United States and Spain. Jul 8, 1898 The United States annexed Hawaii.