The document discusses the Spanish-American War from 1898. It provides background on growing US imperialism and desire for new overseas markets in the late 19th century. Tensions rose due to the Cuban war for independence from Spain and atrocities against Cuban civilians. The sinking of the USS Maine in Havana harbor was blamed on Spain and helped propel the US to declare war, aided by "yellow journalism" exploiting the event. The US defeated Spain and gained control of Puerto Rico, Guam, and the Philippines through the Treaty of Paris, marking the US emergence as a world power.