Timeline Library

HomeNorth AmericaUnited StatesTerritorial Expansion

Territorial Expansion

© 2026 Timeline Library

U.S. Acquisition and Administration of Guam (1898–present)

1898 - 2024

Trust Territory of the Pacific Islands and Postwar Decolonization (1947–1994)

1947 - 1994

Treaty of Paris and Early U.S. Boundary Settlements (1783–1796)

1783 - 1795

Treaty and Purchase: U.S. Virgin Islands Acquisition from Denmark (1917–present)

1916 - 2016

Spanish–American War and U.S. Overseas Acquisitions (1898–1901)

1898 - 1901

Philippine–American War and U.S. Colonial Rule in the Philippines (1898–1946)

1898 - 1946

Pathways from Organized Territory to Statehood: Examples from the 19th Century (1803–1890)

1787 - 1889

Panama Canal Zone: Acquisition, Control, and Transfer (1903–1999)

1902 - 1999

Overthrow of the Hawaiian Kingdom, Annexation, and Territorial Period (1893–1959)

1887 - 1959

Oregon Treaty and American Settlement of the Oregon Country (1846–1860)

1818 - 1855

Northwest Territory and the Northwest Ordinance (1787–1803)

1784 - 1803

Mexican–American War and the Mexican Cession (1846–1848)

1846 - 1848

Page 1 of 2Next