US President Donald Trump’s renewed interest in purchasing Greenland has revived historical discussions about America’s territorial expansion through land acquisitions. Historians note that the United States has a long tradition of expanding its borders by buying territories rather than seizing them by force. Trump’s stated rationale for seeking Greenland’s ownership centers on national security, and he has expressed a preference for negotiation over coercion.

The article outlines key historical land purchases that shaped the modern United States. These include the 1803 Louisiana Purchase from France, which doubled the nation’s size; the 1848 acquisition of Mexican territories following the Guadalupe Hidalgo Treaty; the 1853 Gadsden Purchase from Mexico; the 1867 purchase of Alaska from Russia; and the 1917 acquisition of the Virgin Islands from Denmark. Each transaction reflected strategic, economic, or security motivations.

Historians draw parallels between Trump’s Greenland proposal and earlier US acquisitions, suggesting continuity in Washington’s approach to securing strategic territories through financial means rather than military confrontation.