The Spanish American War was caused by American sympathy for Cuban rebels fighting for independence from Spanish rule, America's interest in expanding its influence outlined in the Monroe Doctrine, and economic interests in Cuban sugar plantations. Yellow journalism in American newspapers exaggerated Spanish atrocities and stirred up pro-war sentiment, culminating in calls for war after the mysterious sinking of the USS Maine. The war resulted in Spain losing control of Cuba, Puerto Rico, Guam, and the Philippines, with Cuba gaining nominal independence as a US protectorate and the others becoming US territories.