475
Signing the agreement on sale of Alaska March 30, 1867.
Alaska was sold to Russia to the United States in 1867 for the sum of a little more than $ 100 million in terms of date.
After 30 years after the sale of gold deposits discovered there began the famous "Gold Rush", and in the 20th century were discovered and large oil and gas fields with total reserves amounting to 100-180 billion dollars.
