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					Originally Posted by Jeff D
					
				 
				Hi Saqr, 
 
Are you referring to the Southern boarder states (Oman, Yemen) or are you refering to the entire Arabian peninsula? 
 
Jeff 
			
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 Hi Jeff, 
Im referring to the entire peninsula, and specifically Nejd and the Hijaz. Nothing is known about what happened between the 13th-17th centuries there, things like the many towns and cities established now, that were not there pre-13th century. Tribes and tribal confederations, the position of the grand sharif, when did the start? Ruling families and classes, and when they started to rule. Many things.