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Joukowsky Institute for Archaeology & the Ancient World
Brown University
Box 1837 / 60 George Street
Providence, RI 02912
Telephone: (401) 863-3188
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The rivalry and power struggle between these two groups majorly influenced the Umayyad caliphate/dynasty. Allegiances with these groups polarized Arabs throughout the empire, and by the time of Hisham's rule in 724, it was impossible for Muslim leaders to not rely on either faction for support in political or military campaigns. While the Qays and Yaman weren't in themselves political parties, each group held common interests related to military responsibilities, conquest shares, governorships, etc. that fueled their rivalry with each other, a rivalry which later helped open up the door for Iraqi groups to assume power over the empire.
Posted at Feb 19/2009 10:58AM:
ian: Syrian based. Major role in the conquests of the Umayyads.