Battle of Isly

The Battle of Isly opposed French army directed by Bugeaud to Moroccan army of Sultan Abd al-Rahman, commanded by his son Moulay Muhammad. Though greatly inferior in number, French army crushed Moroccan forces thanks to skillful maneuver in open terrain. This decisive victory compelled Morocco to cease support for Emir Abd el-Kader, marking major turning point in Algerian war and in Franco-Moroccan relations.

In 1844 Morocco was accused of granting asylum to Abd el-Kader, France's sworn enemy. Tensions rose to direct confrontation. Marshal Bugeaud received orders to conduct incursion into Moroccan territory to compel sultan to break with Abd el-Kader. Battle took place near Oued Isly, where Moroccan forces had established vast camp. Though Moroccans had very numerous army, their command and discipline were weak against well-structured French army firmly commanded.

Bugeaud deployed troops in square, formidable defensive formation against numerous but poorly organized Moroccan cavalry. Profiting from open terrain, he placed artillery at center to maximize effectiveness. After repulsing Moroccan charges, he launched counter-offensive supported by French cavalry taking enemy in flank. Maneuver provoked panic in Moroccan ranks, triggering general rout. Prince Moulay Muhammad's command tent was captured and enemy artillery seized.

French victory allowed imposition of the Treaty of Tangier (10 September 1844), by which Moroccan sultan officially recognized French sovereignty over Algeria and pledged no longer to support Abd el-Kader. Battle of Isly ended Franco-Moroccan war and strengthened France's position in North Africa. It also allowed Bugeaud to reinforce personal prestige. Event was celebrated in France and commemorative medal was created. Name 'Isly' was given to several streets and boulevards (notably in Paris).