Complex sentence: When Abu Taghlib, joined by Mufarrij's rivals, the Banu Uqayl, attacked Ramlah, Mufarrij called upon al-Fadl for aid, and in the ensuing battle on 29 August Abu Taghlib was defeated and taken captive by Mufarrij.
Split into simpler sentences: When Abu Taghlib, joined by Mufarrij's rivals, the Banu Uqayl, attacked Ramlah, Mufarrij called upon al-Fadl for aid. Al-Fadl agreed, and in the ensuing battle on 29 August Abu Taghlib was defeated and taken captive by Mufarrij.