The Green March () was a strategic mass demonstration in November 1975, coordinated by the Moroccan government and the military, to force Spain to hand over the disputed, autonomous semi-metropolitan province of Spanish Sahara to Morocco. The Spanish government was preparing to abandon the territory as part of the decolonization of Africa, just as it had granted independence to Equatorial Guinea in 1968. The native inhabitants, the Sahrawi people, aspired to form an independent state. The demonstration of approximately 350,000 Moroccans advanced several kilometers into the Western Sahara territory. The operation also relied on logistical support and tacit approval from the United States Department of State and the CIA, as Washington and Paris, within the context of the Cold War, favored the integration of the territory into pro-Western Morocco over the emergence of an independent state potentially aligned with Algeria and the Eastern Bloc.
The Green March was condemned by the international community, notably in United Nations Security Council Resolution 380. The march was considered an attempt to bypass the International Court of Justice's Advisory opinion on Western Sahara that had been issued three weeks earlier. Morocco gained control of most of the former Spanish Sahara, which it still holds to this day. The refusal of the Sahrawi people to submit to the Moroccan monarchy shaped the Western Sahara conflict, still unresolved today, whose main episode was the Western Sahara War.
Background
Spain in Western Sahara The territory of Western Sahara, inhabited predominantly by nomadic Sahrawi tribes (subgroups of the Arab-Berber Bidhan), had been a Spanish possession since the last third of the 19th century. The first coastal settlement was founded in 1884 at Villa Cisneros (modern-day Dakhla), and over the following decades military occupation expanded inland, resulting in the establishment of the Spanish Sahara through the merging of Saguia el-Hamra in the north and Río de Oro in the south. Effective control over the desert interior, driven by geostrategic motives to safeguard the nearby Canary Islands, was only consolidated after 1934 with the establishment of the military base at Smara, and was completed during the Francoist regime.
In 1958, to avoid the early waves of decolonization and counter Arab nationalist pressure, the regime of Francisco Franco changed the formal status of the colony, proclaiming it the 53rd Spanish province and granting Spanish citizenship to Sahrawi residents, though they remained in a socially subordinate position. The Spanish administration systematically sought to isolate the indigenous population from Moroccan and Mauritanian influences; a secret 1960 document from the Spanish High General Staff explicitly recommended implementing "an anti-Moroccan, but non-nationalist policy".
The United Nations, refusing to recognize "provincialization" as a legitimate form of self-determination, placed Spanish Sahara on its list of non-self-governing territories in 1960. Through Resolution 2072 on 16 December 1965, the United Nations General Assembly repeatedly called on Spain to decolonize the territory and organize a referendum on self-determination for the indigenous population.
A significant economic incentive for maintaining Spanish presence emerged in the early 1960s with the discovery and subsequent exploitation, beginning in 1962, of the vast phosphate deposits at Bou Craa. However, continued colonial paternalism and the socio-economic marginalization of Sahrawis fueled anti-colonial opposition, culminating in the violent Spanish repression of protesters during the 1970 Zemla uprising in El Aaiún.
Moroccan and Mauritanian claims and domestic politics Morocco, to the north of Spanish Sahara, had long claimed that the territory was historically an integral part of Morocco under the ideology of Greater Morocco, which had previously led to border clashes with Spain during the Ifni War (1957–1958). In the early 1970s, the monarchy of Hassan II faced a severe domestic crisis of legitimacy and repression known as the "Years of Lead", during which the King survived two military coup attempts in 1971 and 1972. The nationalist cause of Western Sahara became a crucial instrument to unite the armed forces, legitimize the monarchy, and forge national consensus across conservative and left-wing opposition parties.
At the same time, Sahrawi nationalism solidified: in 1973, led by Sahrawi university students including El-Ouali Mustapha Sayed, the Polisario Front was founded as an anti-colonial guerrilla movement armed and financed by neighboring Algeria. Under pressure from both Polisario insurgency and parallel territorial claims from Mauritania to the south, the Spanish government agreed in 1974 to conduct a census to prepare for a UN-sponsored self-determination referendum scheduled for the following year. Spain also attempted unsuccessfully to create a pro-Spanish political faction, the Partido de la Unión Nacional Saharaui (PUNS).
The International Court of Justice advisory opinion Morocco intended to vindicate its claims and halt the planned referendum by demanding an advisory opinion from the International Court of Justice (ICJ). A UN visiting mission that toured the territory in May 1974 had concluded that the overwhelming majority of Sahrawis rejected annexation by either Morocco or Mauritania and favored complete independence, with the Polisario Front as their leading political force.
The ICJ issued its opinion on 16 October 1975. The court found that Western Sahara was not terra nullius at the time of Spanish colonization, and recognized that historical legal ties of allegiance (bay'a) existed between "some, but only some" Sahrawi tribes and the Sultan of Morocco, alongside land rights ties with Mauritanian tribes. However, the court unanimously concluded that none of these historical ties constituted legal ties of territorial sovereignty between Western Sahara and either state, and therefore could not override the application of General Assembly Resolution 1514 (XV) regarding the decolonization of Western Sahara and the indigenous population's right to self-determination through a free and genuine expression of their will.
Preparation and logistics Announcement of the March Having been briefed through diplomatic channels on the likely outcome of the ICJ ruling, Hassan II held a secret meeting on 26 September 1975 with provincial governors to plan a mass mobilization. Days later, the CIA informed US Secretary of State Henry Kissinger of Moroccan invasion plans; the US advised formal caution but assured tacit support to prevent an independent Western Sahara from falling into the socialist orbit of Algiers and Moscow.
Within hours of the ICJ verdict's release on 16 October 1975, the King addressed the nation on state television. Selectively citing paragraph 162 of the ruling—which acknowledged historical ties of allegiance—while omitting the court's final conclusion favoring self-determination, Hassan II declared that "the right has prevailed over injustice". He announced the organization of a peaceful "Green March" of 350,000 unarmed civilian volunteers carrying Qur'ans and Moroccan flags to cross into Spanish Sahara and "reunite it with the Motherland".
Recruitment and logistical scale Within three days, over 524,000 Moroccan citizens registered at recruitment offices. The government established regional quotas to select the final 350,000 participants: southern coastal provinces between Marrakesh and Agadir contributed over 120,000 marchers, central Atlantic coastal cities provided 72,000, and southern border provinces such as Tarfaya, Tiznit, and Errachidia contributed 53,000. Northern Morocco (from Tangier to Oujda) was deliberately underrepresented with 65,000 participants. University students were excluded for political security reasons, while participation was encouraged for 50,000 women and a significant contingent of civil servants.
The logistical effort was immense, financed by state funds and financial donations from Arab League allies, primarily Saudi Arabia: A total of 113 special trains and over 2,100 light vehicles and 6,000 requisitioned trucks and buses transported volunteers to the southern staging area in Tarfaya. A massive tent city covering 70 km² with 22,000 tents was erected near the border. Over 17,000 tons of food and 127,800 tons of water and fuel supplies were stockpiled and continuously airlifted by Royal Moroccan Air Force C-130 aircraft, supported by 470 civilian doctors and 230 ambulances.
Covert military operations
While international attention focused on the civilian encampment at Tarfaya, the Moroccan Army launched a covert military invasion along the eastern frontier of Spanish Sahara. Beginning on 31 October 1975, armored and infantry units totaling approximately 10,000 troops crossed the northeastern border, clashing with Polisario Front forces and occupying remote outposts evacuated by Spain, including Farsia, Haousa, and Idiriya. This maneuver aimed to block any potential conventional military intervention by Algeria and fix Polisario guerrilla forces inland, far from the Atlantic coast where the civilian march was scheduled to cross. Additionally, some 30,000 regular army soldiers in civilian clothes and gendarmes were embedded within the civilian march to maintain discipline, control column movements, and provide internal security.
The Green March
Border crossing (6 November) The crisis erupted during a moment of deep domestic political vulnerability in Spain: General Francisco Franco lay dying in Madrid (he would die on 20 November 1975), while Prince Juan Carlos acted as temporary head of state in an atmosphere of institutional uncertainty. Prime Minister Carlos Arias Navarro's government, fearing that armed clash in Africa could trigger a domestic revolution similar to Portugal's Carnation Revolution, ordered military forces to avoid bloodshed.
On 4 November, the Spanish military commander in the Sahara, General Federico Gómez de Salazar, activated "Operation Marabunta": Spanish Legion and army regiments withdrew 12 kilometers from the border, establishing a fortified line of minefields and defensive entrenchments north of Daoura to protect the capital, El Aaiún.
On the evening of 5 November, Hassan II gave the radio broadcast order to advance. At 10:33 am on 6 November 1975, the first echelon of some 40,000 civilians, led by Prime Minister Ahmed Osman, cut through barbed wire at the border post of Tah, overrunning the abandoned station and entering Spanish Sahara chanting religious and patriotic slogans. They advanced ten kilometers before halting in front of the Spanish minefield line, setting up makeshift camps where they spent the night facing Spanish troops who were under orders not to fire unless provoked.
Diplomatic escalation and withdrawal (7–10 November) The UN Security Council met urgently, adopting Resolution 379 and, on 6 November, the stronger Resolution 380, which deplored the march and called on Morocco to withdraw all participants immediately across its international border.
Hassan II escalated pressure on 7 November by sending a second column of 100,000 marchers across the border from Abattekh toward Hagunia, and deploying a third group from Zag to threaten the Spanish garrison at Mahbes with encirclement. To prevent accidental skirmishes along the minefields from escalating into war, Spanish Minister of the Presidency Antonio Carro Martínez flew to Agadir on 8 November to negotiate with Hassan II.
A tacit compromise was reached during the talks: the King agreed to withdraw civilian marchers, and in return Spain committed to open immediate bilateral negotiations over the territory's handover, excluding the UN and the Polisario Front. On 9 November, Hassan II announced the conclusion of the march via radio: