During the Mamluk era, the Al Fadl's territory spanned the area between Homs in the west to Qal'at Ja'bar in the northeast and all along the Euphrates valley through the countryside of Basra southward to the Washm region in central Najd. Mamluk patronage of the Al Fadl enabled them to dominate the other Bedouin tribes of the Syrian Desert. A rival sub-branch of Al Fadl, the Al ʿAli, controlled the Ghouta region of Damascus and the northern Arabian regions of Tayma and al-Jawf, while Al Mira controlled the area of Jawlan southward to the al-Harrah hot springs in Hejaz. Other branches of the Banu Tayy controlled regions within the Banu Rabi'ah's territory. Among them were the Shammar and Banu Lam in the north Arabian mountains of Jabal Ajaʾ and Jabal Salma.