On October 18, 1867, the United States took formal possession of Alaska from Russia having paid $7.2 million for it. An excerpt from the article:
"On October 18, 1867, the U.S. formally takes possession of Alaska after purchasing the territory from Russia for $7.2 million, or less than two cents an acre. Indigenous peoples settled the unforgiving territory thousands of years earlier. The Alaska purchase comprised 586,412 square miles, about twice the size of Texas, and was championed by William Henry Seward, the enthusiastically expansionist secretary of state under President Andrew Johnson.
Russia wanted to sell its Alaska territory, which was remote and difficult to defend, to the U.S. rather than risk losing it in battle with a rival such as Great Britain. Negotiations between Seward (1801-1872) and the Russian minister to the U.S., Eduard de Stoeckl, began in March 1867. However, the American public believed the land to be barren and worthless and dubbed the purchase “Seward’s Folly” and “Andrew Johnson’s Polar Bear Garden,” among other derogatory names. Some animosity toward the project may have been a byproduct of President Johnson’s own unpopularity. As the 17th U.S. president, Johnson battled with Radical Republicans in Congress over Reconstruction policies following the Civil War. He was impeached in 1868 and later acquitted by a single vote. Nevertheless, Congress eventually ratified the Alaska deal."