The document provides an overview of the factors that led the United States to become a colonial power in the late 19th century, including commercial and business interests in foreign trade and investments; military and strategic thinking promoting expansion; social Darwinist ideologies; religious missionary activities; closing of the American frontier; and strategic interests in Hawaii, Cuba, the Philippines, and other regions. It then examines specific US territorial acquisitions and interventions in those regions, along with the country's growing role on the international stage as a Pacific and global power through the early 20th century.