The document discusses the causes of the Spanish-American War in 1898 that led the United States to declare war on Spain. It identifies four main factors: 1) The Cuban War of Independence from 1895 where Cubans rebelled against brutal Spanish rule seeking independence; 2) The explosion of the USS Maine in Havana harbor in 1898 that killed 260 Americans and was blamed on Spain; 3) A letter from the Spanish Ambassador insulting President McKinley that angered Americans; 4) Yellow journalism from newspapers like Hearst that exaggerated pro-war stories and appealed to American patriotism. Together these factors increased tensions and pushed President McKinley to ask Congress to declare war on Spain in April 1898.