US possessions between 1851 and 1899 included?

Between 1851 and 1899, the United States acquired several territories and possessions, including the annexation of Hawaii in 1898, the purchase of Alaska from Russia in 1867, and the acquisition of Guam and Puerto Rico following the Spanish-American War in 1898. Additionally, the U.S. established control over the Philippines during the same conflict. This period marked significant expansion and the emergence of the U.S. as an imperial power.