He was a Greek from what is now Turkey. He joined the Roman army. He was martyred as a Christian in Palestine. And somewhere along the line he is said to have killed a dragon. Allegedly.

Portugal, England, Bosnia and Herzegovina, Bulgaria, Georgia, Ukraine, Malta, Ethiopia, Catalonia and Aragon, and the cities of Moscow and Beirut have claimed him as their patron saint.

So, happy St. George's day, everyone!