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American empire overseas, 1898–1917

The islands the United States took or bought across the Pacific and the Caribbean.

Orange is land the US gained in the step you're looking at; blue is land it already held. Small islands are marked with a dot so you can find them.

Every step in words

  1. 1898: Hawaii and the war with Spain

    Borders as of 10 December 1898

    Congress annexed Hawaii in July 1898. In December, the Treaty of Paris ended the Spanish–American War: Spain gave up Puerto Rico, Guam and the Philippines (the US paid $20 million), and gave up Cuba, which US troops occupied until 1902; after that Cuba was independent but under heavy US control.

    The US had become a colonial power, and Americans argued hard about it. Anti-imperialists like Mark Twain said ruling other peoples went against American ideals. Filipinos who wanted independence fought the US from 1899 to 1902.

    Topic 7.2, Topic 7.3

  2. 1900: American Samoa

    Borders as of 16 February 1900

    The US, Britain and Germany split the Samoan Islands. The US took the eastern islands, with the harbor of Pago Pago.

    Coaling stations for steamships, like Pago Pago, Pearl Harbor and Guam, let the navy reach across the Pacific to Asian markets, which was the goal of thinkers like Alfred Thayer Mahan.

    Topic 7.2

  3. 1917: The U.S. Virgin Islands

    Borders as of 31 March 1917

    The US bought the Danish West Indies from Denmark for $25 million and renamed them the Virgin Islands.

    The islands guarded the sea routes to the Panama Canal, which opened in 1914, at a time when the US feared Germany might seize them during World War I.

    Topic 7.2, Topic 7.5

Where the borders come from

What to keep in mind

  • The islands are drawn with today's coastlines from Natural Earth, which match their borders at the time. Hawaii is from the Atlas.
  • The Panama Canal Zone (1904–1979), smaller Pacific islands such as Wake and Midway, and Cuba, which was independent but under US control, are not drawn.