The US acquired Alaska by buying it from Russia. In 1867, the US government purchased Alaska from Russia for $7.2 million, in a deal known as the Alaska Purchase. This purchase was negotiated by Secretary of State William H. Seward, who believed that Alaska had great potential for resources and trade. Despite initial skepticism and criticism, the acquisition of Alaska turned out to be a valuable investment for the US, as it eventually became a major source of gold, oil, and other natural resources. Today, Alaska is the largest state in the US by land area.