1. At the end of the 19th century, America joined the imperialist club due to growing commercial and business interests in foreign markets, as well as strategic military motivations to protect economic interests abroad. 2. The U.S. acquired Alaska from Russia in 1867, annexed Hawaii in 1898 to gain control over Pacific trade routes, and went to war with Spain in 1898 after the sinking of the USS Maine to gain Spanish colonies like Cuba, Puerto Rico, and the Philippines. 3. The U.S. established itself as a Pacific power through victories in the Spanish-American war and pursued an imperial agenda of expanding its economic and political influence in China, Latin America, and around the globe at the turn