By the end of the Spanish-American War, the United States had control over the following three countries:
Cuba: The United States helped Cuba gain independence from Spain and then established a protectorate over the island nation.
Puerto Rico: Puerto Rico was ceded to the United States by Spain as part of the peace settlement that ended the war.
The Philippines: The Philippines was also ceded to the United States by Spain as part of the peace settlement.
The Spanish-American War was a conflict that took place in 1898 and was fought between Spain and the United States. It resulted in a decisive victory for the United States, which acquired a number of territories as a result of the conflict.