Question: why did the united states declare war with spain on april 21 1898 quizlet?
Answer: In 1898 the United States declared war on Spain following the sinking of the Battleship Maine in Havana harbor on February 15, 1898. ... America's supported the Cubans and Filipinos against the Spanish rule. The sinking of the battleship U.S.S. Maine in Havana Harbor.