The United States defeated Spain in the Spanish–American War in 1898, and gained the possessions of Cuba, Puerto Rico, and the Philippines. The territory of Hawaii was annexed in 1898. By the early 20th century, the United States would come to be considered a great power,[23] marked by its participation in the Boxer Rebellion outside of the Americas region, as well as for Woodrow Wilson's participation in the Paris Peace Conference of 1919,[24] the first international trip by a U.S. President outside of the Americas.