Aspects of this topic are discussed in the following places at Britannica.
...ʿAbbāsid control, and, when the Banū Yaʿfur—the pre-Islāmic nobility—set up an independent dynasty there in 859, they soon forced the Ziyādī ruler Ibrāhīm ibn Muḥammad (859–902) to cede territory in return for tribute. More territory, including Zabīd itself, was lost to the sectarian Qarmaṭians after...
We welcome your comments. Any revisions or updates suggested for this article will be reviewed by our editorial staff. Contact us here.
Regular users of Britannica may notice that this comments feature is less robust than in the past. This is only temporary, while we make the transition to a dramatically new and richer site. The functionality of the system will be restored soon.