15 U.S. Territories That Formerly Belonged To Other Countries

15. Alaska (Russia)

Acquired from Russia in 1867, Alaska was previously known as Russian America. The transfer, referred to as the Alaska Purchase, brought with it Russian Orthodox churches, place names, and a legacy seen in communities like Sitka. The $7.2 million deal is one of the most significant territorial expansions in U.S. history. (britannica.com)