Editing Najd (section)

==== Post–Ridda wars, until the 10th century ====
Muhammad's followers rapidly expanded the territory under Muslim rule beyond Arabia, [[Early Muslim conquests|conquering huge swathes of territory]] from the [[Iberian Peninsula]] in the west to modern day [[Pakistan]] in the east in a matter of decades. The bulk of the tribes that helped the [[Rashidun Caliphate|Caliphate]]'s expansion into Persia and the Levant were composed of Najdi tribes such as [[Banu Tamim]]. The [[Rashidun Caliphate|Caliphate]]'s use of these once-rebellious tribes allowed [[Abu Bakr]] and [[Umar]] to quickly deploy battle hardened men and experienced generals such as [[Al-Qa'qa' ibn Amr al-Tamimi]] into the front-lines against the [[Persians]] and [[Byzantine Empire|Byzantines]].

Najd soon became a politically peripheral region of the [[Muslim world]] as the focus shifted to the [[Caliphate|outside of the peninsula]]. Many of members of the conquering tribes of Najd soon shifted into the Levant, Persia and North Africa, playing a role in future conflicts in the caliphate, becoming governors and even birthing emirates such as the [[Aghlabids]].<ref>{{cite book |title=Daily Life in the Medieval Islamic World |author=James E. Lindsay |year=2005 |isbn=0-313-32270-8 |page=[https://archive.org/details/dailylifeinmedie00lind/page/33 33] |publisher=Greenwood Press |url=https://archive.org/details/dailylifeinmedie00lind/page/33}}</ref> Migrations continued throughout the centuries back and forth from Nejd to Iraq and the Levant, with many Najdi tribes reaching Khorosan and the Maghreb.