Algeria P137 100 dinars 1992 UNC｜cavalry｜Spanish defeat｜Barbary Coast｜85711

Front: Soldiers with spears and shields charging behind horseback cavalier with sabre during the Battle of El Harrach resulting in Algiers' victory over Spain in 1775.
Back: Charging Algerian horseriders, Spanish galleon

El Harrach 1775: when Algiers taught Spain that it would not be conquered
(or: why the United States' first diplomatic relations were with North Africa)

Spain had been testing the southern edge of the Mediterranean for centuries by the time it tried, once again, to force Algiers into submission. From the early 1500s onward, Spanish crowns planted flags along the Barbary Coast—Oran, Mers el-Kébir, scattered fortresses meant to bottle up corsairs and project imperial confidence across the sea. But North Africa was never a passive frontier. It was urban, armed, maritime, and politically sophisticated, and Algiers in particular had grown into a formidable power: wealthy, well-defended, and stubbornly autonomous.

By 1775, Madrid believed it was time for a decisive blow. Spain assembled a massive amphibious force and sent it against Algiers, convinced that overwhelming numbers and modern artillery would finally break resistance. The plan looked impressive on paper. In reality, it collapsed almost immediately.

What followed at El Harrach was not a heroic last stand, but a humiliation. Spanish troops were drawn inland, away from their naval support, into terrain the Algerians knew intimately. The defenders—forces of the Deylik of Algiers, combining local fighters and seasoned troops—sprang the trap. The result was chaos: heavy Spanish casualties, abandoned cannons, and a panicked retreat back to the coast. The Battle of El Harrach did more than repel an invasion; it sent a clear message that Algiers was not a weak corsair nest waiting to be subdued, but a state capable of coordinated defense against a European power.

This mattered far beyond Spain’s wounded pride. Across the Atlantic, the newly independent United States was watching closely. Lacking a navy and desperate to protect its merchant shipping, the U.S. would soon become one of the first Western nations to formally recognize and negotiate with the Barbary states, including Algiers. Treaties, tributes, and later open conflict—the Barbary Wars—were acknowledgments of a reality Europeans had long known but often refused to accept: North African polities were sovereign actors, not colonies-in-waiting.

Seen through this lens, El Harrach feels less like an isolated skirmish and more like a pattern. Algerians—and North Africans more broadly—were never easily folded into imperial systems. Their political culture emphasized local authority, armed autonomy, and a sharp awareness of foreign ambition. In that sense, they were not “exceptions” within the so-called Arab world, but heirs to a Mediterranean tradition of city-states and maritime powers that predated modern empires altogether.

That same instinct would resurface a century later, when France finally succeeded where Spain failed—occupying Algiers in 1830. Even then, conquest did not mean submission. The memory of victories like El Harrach lingered, feeding a long resistance that culminated in one of the twentieth century’s most brutal independence wars. When Algerians fought France from 1954 to 1962, they were not inventing defiance; they were reviving it.

Money, too, remembers these moments. Coins and banknotes from Algeria quietly testify to a place that refused to be peripheral—minting authority, projecting legitimacy, and surviving repeated attempts to erase it. El Harrach was one battle, one day. But it sits on a long arc of independence that shaped how Algiers dealt with Spain, the United States, France, and the modern world that followed.