The Peñón de Vélez de la Gomera was an island. Then in 1934, a storm built a sandbar between the rock and the Moroccan coast, and the island became a peninsula — connected to Africa by approximately 85 meters of sand. The sandbar created what is, depending on your measurement, the shortest international border on Earth: a line of sand between Spain and Morocco, roughly the width of a football field, at the base of a 90-meter limestone spire garrisoned by Spanish soldiers. There is no formal border treaty for this line because the border did not exist when Spain conquered the rock in 1508. Nature drew it 426 years later. Spain maintains a military garrison on a peninsula that was an island until the weather changed, connected to a continent Spain does not control by a strip of sand that could, in theory, be washed away by the next sufficiently large storm. If the sandbar erodes, the border disappears and the Peñón becomes an island again. If the sandbar persists, Spain holds Europe’s most improbable foothold on the African mainland — a foothold nobody planned, nobody negotiated, and nobody can explain with a straight face.
The Peñón de Vélez de la Gomera is one of the plazas de soberanía — “strongholds of sovereignty” — a string of Spanish territories scattered along Morocco’s Mediterranean coast that represent the last physical remnants of a Reconquista-era imperial project and the EU’s only land borders with an African country. The major plazas are Ceuta and Melilla, autonomous cities with combined populations of approximately 170,000. The minor plazas are the Peñón de Vélez de la Gomera, the Peñón de Alhucemas (three rocky islets off Al Hoceima), the Chafarinas Islands (three islands off the Moulouya River delta), and — depending on the classification — Perejil Island (an uninhabited rock that Spain and Morocco briefly went to war over in 2002) and Alboran Island (a small island in the western Mediterranean administered from Almería). Together, the plazas constitute the most complete surviving inventory of pre-colonial European territorial possessions on the African continent — holdovers not from the Scramble for Africa in the 1880s but from the Portuguese and Spanish maritime expansions of the 1400s and 1500s. Ceuta was captured by Portugal in 1415 — the same year as the Battle of Agincourt. Melilla was taken from the Sultanate of Fez in 1497. Spain has held these territories continuously for over five centuries.
Ceuta and Melilla: cities behind walls
Ceuta (19 square kilometers, population 83,000) and Melilla (12 square kilometers, population 87,000) are full autonomous cities of Spain — legally equivalent to Madrid or Barcelona, with elected assemblies, courts, hospitals, universities, and a demographic mix of Spanish, Amazigh (Berber), Arab, Hindu, and Jewish communities that gives them a multicultural character unique in the EU. They are in the EU but outside the Schengen Area and the EU customs union, which means goods cross their borders under different rules than people. The Somaliland post documented a territory that performs statehood without recognition. Ceuta and Melilla perform European modernity — EU membership, democratic elections, multicultural governance — on African soil, without Morocco’s recognition that they belong there. They are defended by the most heavily fortified civilian boundaries in Europe: triple fences 6 meters high, topped with concertina wire, monitored by cameras, sensors, and spotlights, patrolled by Guardia Civil officers on the Spanish side and Moroccan gendarmes on the Moroccan side. The fences exist because Ceuta and Melilla are the only points where a person standing in Africa can walk into the European Union.
The Battlefields of the Future course covers how border infrastructure shapes conflict dynamics. Ceuta and Melilla’s fences are the civilian version: infrastructure designed not for military defense but for migration control, built to prevent the movement of people from one continent to another across a boundary that, in some sections, separates neighborhoods whose residents share a language, a culture, and family ties. The fence cuts through a geography where the human connection is continuous and the political boundary is absolute. The Fergana Valley post documented the same phenomenon in Central Asia — communities divided by borders they didn’t draw, maintained by states whose interests don’t align with the populations living along the line.
On May 17, 2021, over 8,000 migrants crossed into Ceuta in a single day after Morocco relaxed border controls — a surge that both sides understood was not a spontaneous migration event but a political weapon. Morocco had opened the border in retaliation for Spain’s decision to allow Brahim Ghali, the leader of the Polisario Front, to receive medical treatment in a Spanish hospital. The migration surge was a message: Morocco can turn the migration tap on and off, and Spain’s border security depends on Moroccan cooperation. The Shadowcraft course documents how states use coercive leverage through non-military channels. Morocco’s weaponization of migration through Ceuta is the textbook case: the weapon is people, the target is European domestic politics, and the leverage is the fence’s dependency on bilateral cooperation to function.
Spain’s response was transactional. In March 2022, Spain endorsed Morocco’s autonomy plan for Western Sahara — reversing decades of Spanish support for the Sahrawi right to self-determination — and migration flows returned to manageable levels. The trade was explicit: Spain traded its position on Western Sahara for Moroccan border cooperation at Ceuta and Melilla. The Polisario and Algeria were not consulted. The Western Sahara post documented how Morocco’s diplomatic offensive has been peeling away recognitions one by one. Spain’s endorsement was purchased with the migration weapon, and the price was paid by the Sahrawi refugees in the Tindouf camps who had been waiting for a referendum since 1991.
The minor plazas: rocks with garrisons
The minor plazas are the details that make the post surreal.
The Peñón de Alhucemas is a cluster of three islets — the Peñón proper, the Isla de Mar, and the Isla de Tierra — sitting 300 meters off the coast of Al Hoceima, Morocco. The Peñón has a Spanish military garrison, a church, and a cemetery. Population: the garrison. There is no civilian settlement. Spain has held the rock since 1673, when Moroccan Sultan Moulay Ismail ceded it to facilitate the ransom of Spanish prisoners. The islets are within sight and earshot of Al Hoceima’s beachfront — a Moroccan coastal city of 56,000 people can see the Spanish flag from their boardwalk.
The Chafarinas Islands — Congreso, Isabel II, and Rey Francisco — sit 3.5 kilometers off the Moroccan coast near the Moulouya River delta. Spain occupied them in 1848, 24 hours before France could claim them. Isabel II island has a military garrison and a small civilian population. The islands are a nature reserve — home to the world’s second-largest colony of Audouin’s gulls and a population of the endangered Mediterranean monk seal. In January 2020, 42 migrants swam to the Chafarinas from Morocco; the Guardia Civil expelled them immediately without processing their asylum claims, in a “hot return” that drew condemnation from human rights organizations.
Perejil Island — uninhabited, 500 meters off the Moroccan coast near Ceuta — produced the most absurd military confrontation of the 21st century. In July 2002, Morocco stationed six gendarmes on the rock. Spain responded with Operation Romeo-Sierra: commandos from the Grupo de Operaciones Especiales, supported by the Spanish Navy and Air Force, assaulted the island and captured the six Moroccan cadets, who offered no resistance. The United States mediated a return to the status quo: both countries withdrew, and the island has been unoccupied since. The disputed borders post documented 150+ active territorial disputes. The Perejil incident is the only one in which a NATO military conducted an amphibious special operations raid to recapture an uninhabited rock the size of a parking lot from six unarmed border guards.
Morocco’s position
Morocco has claimed the plazas de soberanía since independence in 1956. Its argument is straightforward: the territories are on or adjacent to the Moroccan coast, were taken by European colonial powers during periods when Morocco could not resist, and should be returned under the same decolonization principles that ended European rule across Africa. Morocco considers the plazas equivalent to Gibraltar — a European territory on someone else’s continent, held by force of history rather than force of law.
Spain’s counterargument is also straightforward: Spain held Ceuta and Melilla before Morocco existed as a modern state. Ceuta has been Spanish or Portuguese since 1415. Melilla since 1497. These are not colonial possessions acquired during the Scramble for Africa — they are medieval conquests that predate the colonization of the Americas. The Mount Athos post documented a medieval theocracy preserved inside the EU by constitutional exemption. Ceuta and Melilla are medieval conquests preserved inside the EU by the same combination of historical inertia, constitutional entrenchment, and the practical reality that no EU member state will negotiate the surrender of territory that 170,000 of its citizens call home.
The deeper structural comparison is Northern Cyprus — not because the situations are identical but because the mechanism is. Turkey maintains 40,000 troops in Northern Cyprus and claims the territory is independent. Spain maintains military garrisons in the plazas and claims the territories are integral parts of Spain. Morocco calls the plazas colonies. Greece calls Northern Cyprus occupied. The occupying powers in both cases argue that history and demographics justify the status quo. The challenging powers in both cases argue that decolonization principles require withdrawal. The Artsakh post showed what happens when a challenging power has the military capability to take the territory back. The Abkhazia post showed what happens when the patron’s military deters any such attempt. Morocco has neither the military capability to retake the plazas nor the diplomatic leverage to force Spain’s withdrawal, which is why the dispute has lasted five centuries and shows no sign of resolution.
Why they’re in the course
Spain’s African enclaves are the Off The Map case study in colonial permanence — territories that other European empires surrendered during decolonization and that Spain simply… didn’t. Diego Garcia is a colonial remnant held for military purposes whose legality the ICJ has ruled against. Western Sahara is a colonial territory whose decolonization was never completed. Spain’s plazas are colonial territories whose colonization was never challenged successfully — held continuously since the 15th century, defended by fences and garrisons in the 21st, and sustained by a legal argument that predates the concept of decolonization by 500 years. The Ilemi Triangle exists because the border was never agreed. The plazas exist because the border was agreed — five centuries ago, by conquest, and nobody has been able to change it since.
This is the kind of place our Off The Map course was built to map — where a storm in 1934 turned an island into a peninsula and created the world’s shortest international border by accident, a NATO military launched a special operations raid to recapture an uninhabited rock from six unarmed border guards, 8,000 migrants crossed into Europe in one day because Morocco turned the migration tap on to punish Spain for hosting a Western Saharan leader in a hospital, the EU’s only land borders with Africa are defended by 6-meter triple fences with concertina wire and surveillance cameras, and the country that holds all of it has been holding it since before Columbus sailed — which is either the longest-running colonial occupation in Africa or the oldest continuous European territorial presence on the continent, depending on whether you ask Madrid or Rabat.