11th on 21 interesting Facts About the U.S.A: The U.S. purchased Alaska from Russia for just US$7.2 million in 1867.
The Alaska Purchase (Russian: Продажа Аляски, tr. Prodazha Alyaski) was the United States’ acquisition of Alaska from the Russian Empire on March 30, 1867 by a treaty ratified by the United States Senate, and signed by president Andrew Johnson