The war was caused by the sinking of the USS Maine in Havana Harbor after it had been ordered to take all American citizens out of Cuba. The Congress sent an ultimatum to Madrid, demanding Cuban independence, but Spain responded by declaring War.
The war was won.
The Spanish-American War was rooted in the decline of Spain as a major power, the interpretation of the Monroe Doctrine by imperialistic Americans and the rise of America as a result of the Industrial Revolution.
Cuban War of Independence
USS Maine Incident
In the Pacific Theater of the Spanish-American War, the US forces, led by Admiral _____, were primarily centered around the small island of Guam and the larger Philippine Archipelago.
In the Caribbean Theater, the main fighting revolved around the two remaining Spanish colonies - Puerto Rico and Cuba.