Wikipedia
Geshur was a territory in the northern part of Bashan, in ancient Levant, adjoining the province of Argob and the kingdom of Aram or Syria. (; ) According to the Bible, it was allotted to the half- tribe of Manasseh, which settled east of the Jordan river, but its inhabitants, the Geshurites, could not be expelled.
In the time of David, Geshur was an independent kingdom, and David married Maachah, a daughter of Talmai, king of Geshur. (, ) Her son Absalom fled to his mother's native country, after the murder of his half-brother and David's eldest son, Amnon. Absalom stayed there for three years before being rehabilitated by David. (ib. , )
Geshur is identified with the plateau called today " Lejah," in the center of the Hauran.
According to Israeli archaeologists, Geshur lay east of the Sea of Galilee, in what is now the southern Golan Heights.