The document introduces American imperialism between 1867 and 1898. It discusses how stronger nations extended political and economic control over weaker territories through colonialism. In the late 19th century, European powers scrambled to claim territory in Africa and Asia. The US began pursuing imperialism for economic, military, and cultural reasons, including the belief in white racial superiority. The US expanded from its longstanding isolationist foreign policy by acquiring Alaska, Midway Islands, and Hawaii in this period. The Spanish-American War of 1898 allowed the US to gain control of Guam, Puerto Rico, and the Philippines, cementing its status as an emerging world power by the early 20th century.