End of the Last War
Halflings are one of the few core PC races actually native to Khorvaire. They originated on the Talenta Plains, domesticating several of the different breeds of dinosaur there to serves as mounts and herd animals. To this day, House Ghalanda remains based on the Plains, while House Jorasco moved their base to Karrnath centuries ago to aid in the spread of their healing services. With this move, many halflings left the Plains, and there is now a divide between the nomads of the Plains and their urban cousins (who are accused of abandoning their roots by their more barbaric tribal cousins).