On this day:

1941 U.S. enters WWII a day after Pearl Harbour attack

1991 Creation of Commonwealth of Independent States, founded by 

1991 The Belavezha Accords, that disbanded the USSR and replaced it with Commonwealth of Independent States was signed

Born on this day:

1542 Mary, Queen of Scots

Gone on this day:

1864 George Boole, English mathematician, philosopher

1903 Herbert Spencer, English biologist, anthropologist, sociologist, philosopher