The Spanish-American War marked the emergence of the United States as a world power. Driven by expansionist and imperialist sentiments, the U.S. went to war with Spain in 1898 over Cuba. The U.S. quickly defeated Spain and gained control of Puerto Rico, Guam, and the Philippines. This victory made the U.S. a colonial power and increased its political and economic influence globally. However, it also led to debates at home over imperialism and America's role in the world.