What was the main reason for the United States' acquisition of the Alaskan Territory from Russia in 1867? To establish a military base near the Arctic. To prevent future military conflicts over the territory. To gain access to natural resources, including gold. To facilitate trade with Asian countries.

The main reason for the United States' acquisition of the Alaskan Territory from Russia in 1867 was to gain access to natural resources, including gold. The U.S. government believed that Alaska had significant potential for economic development and saw it as an opportunity to expand its territory and influence in the region. The purchase, known as the Alaska Purchase, was negotiated by U.S. Secretary of State William H. Seward and was finalized with the signing of the Treaty of Cession on March 30, 1867.