On March the 3rd:
In 1857 France and the United Kingdom declared war on China which later became known as the Second Opium War.
In 1921 two doctors, Frederick Banting and Charles Best, discovered insulin; a hormone which controls the levels of sugar in the blood.
In 1939 Mahatma Gandhi begins a fast to protest against autocratic rule in India.
In 1991 Los Angeles police officers are recorded beating Rodney King. This event later led to the Los Angeles Riots in 1992 in which 63 people died and many more were injured.
It's interesting going back through history to find out what happened on a particular day, but it also helps give you a bigger perpective of things.
Just for a bit of fun why don't you research what happened on your birthday?
AH