August 4, 1916

The United States signed the Treaty of the Danish West Indies, agreeing to purchase what is now the U.S. Virgin Islands from Denmark.


Washington D.C., United States | United States government

Watercolor painting based depiction of The United States signed the Treaty of the Danish West Indies, agreeing to purchase what is now the U.S. Virgin Islands from Denmark. (1916)

The Signing of the Treaty of the Danish West Indies

On August 4, 1916, the United States formally signed the Treaty of the Danish West Indies with Denmark. This significant accord marked the U.S. agreement to purchase the Danish West Indies, which would eventually become known as the U.S. Virgin Islands. The agreement was an important strategic and economic move, underscoring America’s expanding influence in the Caribbean region.

Background

Throughout the 19th and early 20th centuries, the United States had been interested in acquiring territories in the Caribbean to strengthen military presence and protect strategic interests, particularly the Panama Canal, which completed in 1914. The Danish West Indies, consisting of the islands of Saint Thomas, Saint John, and Saint Croix, presented an opportunity. These islands had been under Danish control since the 17th century and were initially a hub for the transatlantic slave trade and sugar production under Denmark’s colonial holdings.

Key Details of the Treaty

The treaty negotiations, driven by global wartime concerns during World War I, resulted in the U.S. agreeing to pay Denmark $25 million in gold for the islands. The hefty sum reflected their strategic importance rather than their economic productivity at that time. The transfer of sovereignty was framed within the broader context of the Monroe Doctrine, aiming to limit European influence in the Western Hemisphere.

Consequences and Historical Significance

The purchase of the Danish West Indies was finalized on March 31, 1917, thereby officially incorporating them into American territory as the U.S. Virgin Islands. This acquisition fortified the United States’ military and economic position in the Caribbean. It allowed the U.S. Navy to establish bases that could protect the Atlantic approaches to the Panama Canal, a crucial global maritime passage.

The transfer affected the inhabitants of the islands who would now come under U.S. jurisdiction. The purchase did not automatically grant citizenship to the island’s residents, an issue that would evolve throughout the 20th century, reflecting broader themes of territorial integration and citizenship within the expanding American empire.

The signing of the Treaty of the Danish West Indies represents a critical moment in the territorial expansion of the United States, highlighting the strategic military calculations of the era and the enduring influence of colonial legacies in shaping modern geopolitics.