The purchase added of new territory to the United States for the cost of $7.2 million 1867 dollars (2 cents per acre). In modern terms, the cost was equivalent to $ million in dollars or $ per acre. Reactions to the purchase in the United States were mostly positive, as many believed possession of Alaska would serve as a base to expand American trade in Asia. Some opponents labeled the purchase as "Seward's Folly", or "Seward's Icebox", as they contended that the United States had acquired useless land. Nearly all Russian settlers left Alaska in the aftermath of the purchase; Alaska would remain sparsely populated until the Klondike Gold Rush began in 1896. Originally organized as the Department of Alaska, the area was renamed the District of Alaska (1884) and the Alaska Territory (1912) before becoming the modern State of Alaska in 1959.