The arrival of the Hilāli Arabs in the territory of today’s Morocco, called by the Almohad Caliphs, has raised a great controversy among the historians of the Maghreb; their contribution to the army of this empire is also well known since several decades. However, the activities carried out by the Hilāli Arabs in al-Andalus and the uneasy relationships with the local population have not been dealt with to date. The information provided by a collection of chancellery letters will hopefully allow us to study the effects of their presence in south- ern al-Andalus, which was of paramount importance for the decline and the eventual loss of the Almohads’ control over the Iberian Peninsula.<br><br>La llegada de los árabes hilālíes al territorio de...