Yusuf ibn Tashfin in the context of "Lamtuna"

The Almoravid dynasty (Arabic: المرابطون, romanized: Al-Murābiṭūn, lit. 'those from the ribats') was a Berber Muslim dynasty centered in the territory of present-day Morocco. It established an empire that stretched over the western Maghreb and al-Andalus, starting in the 1050s and lasting until its fall to the Almohads in 1147.

The Almoravids emerged from a coalition of the Lamtuna, Gudala, and Massufa, nomadic Berber tribes living in what is now Mauritania and the Western Sahara, traversing the territory between the Draa, the Niger, and the Senegal rivers. During their expansion into the Maghreb, they founded the city of Marrakesh as a capital, c. 1070. Shortly after this, the empire was divided into two branches: a northern one centered in the Maghreb, led by Yusuf ibn Tashfin and his descendants, and a southern one based in the Sahara, led by Abu Bakr ibn Umar and his descendants.

Fez (/fɛz/) or Fes (/fɛs/; Arabic: فاس, romanized: fās) is a city in northern inland Morocco and the capital of the Fez-Meknes administrative region. It is one of the largest cities in Morocco, with a population of 1.256 million, according to the 2024 census. Located to the northwest of the Atlas Mountains, it is surrounded by hills and the old city is centered around the Fez River (Oued Fes) flowing from west to east. Fez has been called the "Mecca of the West" and the "Athens of Africa". It is also considered the spiritual and cultural capital of Morocco.

Founded under Idrisid rule during the 8th century CE, Fez initially consisted of two autonomous and competing settlements. Successive waves of mainly Arab immigrants from Ifriqiya (Tunisia) and al-Andalus (Spain/Portugal) in the early 9th century gave the nascent city its Arab character. After the downfall of the Idrisid dynasty, other empires came and went until the 11th century when the Almoravid Sultan Yusuf ibn Tashfin united the two settlements into what is today's Fes el-Bali (lit. 'Old Fes') quarter, a.k.a. Medina of Fez. Under Almoravid rule, the city gained a reputation for religious scholarship and mercantile activity.

The Battle of Sagrajas (23 October 1086), also called Zalaca or Zallaqah (Arabic: معركة الزلاقة, romanized: Maʿrakat az-Zallāqah), was a conflict fought in 1086 between the Almoravid army, led by their king, Yusuf ibn Tashfin, and the forces of King Alfonso VI of Castile. The Almoravids were called into battle by the taifas, Muslim principalities in Al-Andalus that often fought amongst themselves but united against the expanding Christian kingdoms to the north. In addition to the Almoravid forces, the Taifas, bolstered the Muslim side, tilting the battle in their favor. The battlefield became known as az-Zallaqah (meaning "slippery ground") due to the immense bloodshed that made the terrain treacherous, giving rise to its name in Arabic.