Legends of the Kingdom of Epic Adventure Quest
"We were an ancient experiment gone wrong. The ancients meddled with the very fabric of life, trying to make the ultimate soldier. The blood of a dragon, mixed with the blood of some chattel race, and pumped full of muscle building herbs and spices.
They made one mistake – they gave their ultimate soldier a brain. We didn't take kindly to being ushered into combat as cannon fodder." – Gharash on his race's origins.
The Dragonborn are the descendants of a race created by the Old Empire – or one of its enemies, the truth is not known – to serve as shock troops. It's believed that they were formed by infusions of dragon's blood into more normal humanoid soldiers. They were sent to battle in service to their creators, but knowing they were made simply to act as instead turned upon their creators.
Other races tend to leave the Dragonborn well alone unless in need of their combat credentials. They usually form their own communities, which develop along the strongly martial lines implied by the conditioning imposed on their race by their masters. Whereas in a human settlement, many of the citizenry may not have any fighting skills at all, and the defence of the town is undertaken by a professional guard or militia, in a Dragonborn settlement every citizen is expected to take up arms in its defence should the need arise. The use of arms and armour comes naturally to them, and it's a rare Dragonborn that can't use at least one manner of weapon from a young age. They view the idea of a person without the ability to defend themselves with puzzlement at best, and, more commonly, scorn for their weakness.
Due to other races' prejudice, and their own insular nature, Dragonborn are not commonly seen in the company of other races, even in the most cosmopolitan of human towns. They tend not to attain high levels of status outside of their race. Those who do are famous for it.