Basus War

Basus War
Datec. 494–540 CE
Location
The region of Najd in South Arabia
Result Banu Bakr victory; Banu Taghlib tribes all dispersed into Iraq
Belligerents
Banu Taghlib Banu Bakr and all its subdivisions, including the Banu Shayban Himyarite Kingdom
Commanders and leaders
Abu Layla al-Muhalhel 
Imru' al-Qays ibn Aban 
Abu Nuwayra al-Taghlibi 
Jassas ibn Murrah 
Hammam ibn Murrah
al-Harith ibn Abbad
Saad ibn Malik
al-Fand al-Zamani
Marthad'ilan Yu'nim #
Imru' al-Qays
Units involved
Tribal soldiers from Banu Taghlib Tribal soldiers from Banu Bakr At least 500 Himyarite warriors

The Basus War (often written al-Basus War; Arabic: حرب البسوس ḥarb al-basūs) is a famous conflict narrative from the corpus of the ayyām al-ʿarab (Days of the Arabs), traditionally dated to late pre-Islamic Arabia and showcasing the rivalry of the tribes of Taghlib and Bakr. In Arabic historical and literary tradition, it is portrayed as a forty-year tribal war triggered by the killing of a camel belonging to a woman named Basus. The story occupies an important place in Arabic literary culture as a famous aphorism warning against vendetta, kin-violence, and escalation.

Modern scholarship, however, increasingly treats the Basus War not as a single, prolonged historical war but as a composite and progressively elaborated narrative, likely originating in a limited skirmish, later expanded in scope, duration, and moral significance through oral poetry, genealogical rivalry, and adab literature. Early sources differ substantially on the sequence of events, the identities of participants, and even the basic motivations involved, suggesting that the narrative stabilized only gradually over time.