After the three year Crimean war from 1853 - 1856 Russia was low on money and wasn't interested in Alaska so they tried to make an offer to the States.
They stayed up all night negotiation, the two eventually agreed to a deal. The two men eventually agreed to a treaty and was signed on March 20th, 1867. Alaska was purchased from Russia and was bought for $7.2 mil which was 2 cents an acre.
There it was! Alaska It became the largest state in America unexpectedly providing a great amount of resources. The location also served well during WWII.