Results of the Spanish American War Isolationism – national policy of avoiding involvement in world affairs Imperialism – one nation controlling a weaker nation The United States emerged as a world power. The US proved to the world that its military was strong and well organized. Other countries began to see the US as a leader, instead of a weak “new” country. Cuba gained its independence from Spain. The US response to the Sinking of the USS Maine was swift and one-sided. The Spanish were defeated quickly and the US declared Cuba a free nation on August 12, 1898. Pop Rocks Go Pop The United States gained possession of the Philippines, Guam, and Puerto Rico. The United States’ defeat of the Spanish Navy extended into the Pacific Ocean. The US gained controlled of these three islands formally held by the Spanish. (See the map below!)