On this date in 1867 the United States purchased Alaska from Russia for the price of $7 million which worked out to about $.02 per acre. This purchase was known at the time as Seward's Folly after Secretary of State William Seward who arranged the purchase. Seward was also in charge of trying to get the Senate to ratify the treaty authorizing the purchase. The treaty was ratified on April 9th but it passed by a single vote.
Think of that. If one person changed their vote from yes to no - Alaska might not be part of the US today.