ightly-guided" caliphs in 661 and ruled to 750.
The last ruler of this dynasty was defeated at the Battle of Great Zab River.  During their reign, Egypt, Palestine, Persia, North Africa, and Spain were absorbed into the empire.  Their rule also saw defeat at Poitiers and failure at the first siege of Constantinople from 674 to 678.  FTP name this dynasty that succeeded the last of the four ?ightly-guided" caliphs in 661 and ruled to 750.
The last ruler of this dynasty was defeated at the Battle of Great Zab River.  
Umayyads