The Sultanate of Aserai is a kingdom in Mount&Blade II: Bannerlord. It is ruled by Sultan Unqid, and occupies the shores and desert beyond the Great Southern Lake, to the south below the continent of Calradia.

The Banu Asera, also known as Aserai, civilization is comprised of numerous clans who all claim their descent from the legendary patriarch Asera. The clans have occupied the springs, oases and coastline settlements of the Nahasa desert and its surrounding areas since ancient times. The Empire becoming weaker has shown an opportunity to the clans, who have formed a confederation in the interests of conquest.

The Aserai pride themselves on flexibility and their armies are the closest thing to a generalized faction within Bannerlord, with a reasonably balanced mix of archers, infantry, and medium spear cavalry, although the focus is greatest on cavalry. With a strong merchant tradition, their caravans are 30% cheaper to build, with a 10% reduction to trade penalties.

The Aserai are the ancestors of the Sarranid faction from Mount & Blade: Warband. Over 200 years, the Banu Sarran clan has supplanted the Aserai from within to become the Sarranid Sultanate, and expanded greatly into former Empire and Vlandian territory.