Syrian Desert
The Arabs historically originate as a Central Semitic group in southern Levant and northern Arabian peninsula. Arab tribes and federations such as Nabataeans, Tanukhids, Salihids, Ghassanids, and numerous other groups were prevalent in southern Levant (Syrian Desert) and northern Arabia. Their expansion beyond Arabia and the Syrian desert is due to the Muslim conquests of the 7th and 8th centuries. Iraq was conquered in 633, Levant (modern Syria, Israel, Palestine, Jordan and Lebanon ) between 636 and 640 CE.