Kahlan
Kahlan was one of the main tribal federations of Saba'a in Yemen.
By the 2nd century BCE Saba'a was declining gradually and its southern neighbor Himyar was able to settle many Nomadic tribes that were allied to Himyar and create a stronger Himyarite nation in the lowlands. Eventually Saba'a was incorporated into Himyar and resistance was reduced to the Kahlan tribes who were overpowered by Himyar and forced out of Highlands in Yemen. Most Of Kahlan remained in the Yemeni desert region around Marib until the destruction of the Dam in the 3rd century CE. this forced the Kahlani tribes to emigrate northwards through Arabia. They reaching as far as Mesopotamia and Syria prior to the 7th Century Arab conquests under Islam. After the Arab conquests, the Kahlani Arabs, among other Qahtani and Adnani tribes, reached all the way to the far edges of the Umayyad Empire.