OpenStax
Open Stax: American Foreign Policy 1890 1914: Turner, Mahan, and Roots of Empire
Examines the development of American foreign policy in the latter part of the 1800s, and what Frederick Jackson Turner and Alfred Thayer Mahan did to further American imperialistic interests.
PBS
Pbs: America 1900: Vice Presidential Nominee: Theodore Roosevelt
Read about Theodore Roosevelt's support for expanding into the Pacific and his desire to make the 20th century the Pacific Century. From an interview with Walter LaFeber on the PBS American Experience series, America 1900.
University of Virginia
Miller Center at Uva: u.s. Presidents: William Mc Kinley: Foreign Affairs
A good description of the foreign policy of President Wiliam McKinley including infornation about the Spanish-American War, the Open Door policy, and the annexation of the Hawaiian Islands.
Country Studies US
Country Studies: Ambivalent Empire
With the purchase of Alaska in 1867, the United States embarked on the road of building an empire. From Alaska to the Spanish-American War to the Philippine Islands, the U.S. grew as an imperial nation throughout the latter half of the...