WWII never technically ended, since Japan and the Soviet Union never signed a peace treaty. I believe that Russia took all of the old USSR's treaty's, but if they didn't, the war would have ended on December 26, 1991, when Japan beat the USSR, as they ceased to exist after that date.
Austria declared independence from Austria-Hungary, and Russia declared independence from the Soviet Union.
All states in the United States that were once independent(California, Texas and Hawaii) use the same state flag that was once used as their old national flag.
The last Confederate general to surrender during the Civil War was a Native American.
Mexican troops crossed into the United States at least 23 times last year on accident.
In the USA, it is not banned by the constitution to enslave someone as a punishment for a crime.
Hawaii's flag has a union jack on it, even though Hawaii was never part of Britian. This is because the Queen of Hawai'i decided that Hawaii needed a national flag, so she combined the US, Britians and Frances flag.
Hawaii used to have the highest literacy rate of any country in the world.
The combined populations of New York City and Los Angeles(in modern times) is more than the entire Confederate States of America at any point in the Civil War.
There was a train chase during the Civil War. A Union train crossed into the South and sabotaged Confederate rail lines as it went. The Confederates started chasing it with a train of their own and eventually the Northern one was captured, but not before doing a heck of a lot of damage.
96% of trains were manufactured in the North on the onset of the Civil War.
I know the modern-day decendant of Robert E. Lee.
Only one person was ever born in Antartica. She was the daughter of some scientists.