The Louisiana Purchase was a land deal between the U.S. and France. The U.S. bought over 800,000 square miles along the Mississippi river(West) for $15 million dollars. This was so important because it expanded the U.S. almost half their size.
I'm pretty sure the answer is indigo. If I'm wrong then I apologize.
The Japanese attacked Pearl Harbor for the main reason of tension in the Pacific. The Americans weren't necessarily in the conflict at this point, but were sitting in the Pacific watching the Japanese, if the Japanese were to grow in power, they can't have the Americans on their tail. The attack counterattacked the Japanese if you really look at it. Most people would relate the Pearl Harbor attacks as "poking the sleeping bear with a stick", and that's true. We turned the fighting back to the Japanese in the months after the attack. And four long years later, we dropped the "Little Boy" atomic bomb on island town of Hiroshima -- And the second bomb called "Fat Man" on Nagasaki 3 days later. The Japanese surrendered less than a month after the bombings. So, the attacks of Pearl Harbor really hurt the Japanese more than it hurt the Americans.
These are some of the presidents's not many people remember:
<span>Herbert Hoover
Martin Van Buren
Warren Harding
Chester Arthur
Millard Fillmore </span>
As far as I now, Marcus Perpena (the consul of 92 BC) was said to have lived to 98. I found this on a website called Quora. (not trying to advertise)
Hope this helped!