How the U.S. Expanded Influence in the Pacific & Latin America (1890s–1930s)

The U.S. demonstrated growing hemispheric and Pacific ambition through a sequence of actions:

1. Annexation of Hawaiʻi (1898): Secured Pearl Harbor as a strategic naval base; extended reach across Pacific.
2. Spanish–American War (1898): Acquired Puerto Rico, Guam, Philippines—first overseas colonial possessions; projected power into Caribbean & Asia.
3. Panama Canal (1904–1914): Engineered Isthmus separation from Colombia; built canal—cut Atlantic–Pacific transit by 8,000 mi; cemented U.S. control over hemispheric shipping.
4. Roosevelt Corollary (1904): Asserted U.S. right to intervene in Latin America to "stabilize" economies—pretext for occupations (Dominican Republic, Nicaragua, Haiti, Cuba).
5. Dollar Diplomacy (Taft, 1909–1913): Substituted military force with financial leverage—U.S. banks/loans to control customs, railways, finances in Honduras, Nicaragua, Liberia.
6. Missionary Diplomacy (Wilson, 1913–1921): Promoted democracy/human rights but intervened repeatedly (Haiti 1915–34, Dominican Republic 1916–24, Nicaragua 1912–33).
7. Good Neighbor Policy (FDR, 1933): Renounced interventionism; non-interference, reciprocal trade, cultural exchange—shift to soft power.

Together, these moved the U.S. from continental power to hemispheric hegemon and Pacific player.