Why the United States Acquired Guam: Strategy, Trade, and War

The U.S. acquired Guam as a result of the Spanish–American War (1898). Under the Treaty of Paris, Spain ceded Guam, Puerto Rico, and the Philippines to the U.S.; Cuba gained nominal independence.

Strategic Rationale

• Naval Power: Deep-water harbor (Apra Harbor) ideal for a Pacific naval base.
• Communications: Key node for trans-Pacific cables and later aviation.
• Trade Gateway: Positioned for commerce with Asia; hub for trans-Pacific routes.
• Military Staging: Used in WWII, Vietnam, and as a missile defense site.

Guam remains a critical U.S. territory for Indo-Pacific defense and power projection.