Chapter 01 · c. 8th – 14th century CE
Settlement and the Coming of Islam
Settled by Austronesian seafarers and Bantu-speaking Africans, the islands were drawn into the trade of the Swahili coast and the wider Indian Ocean, and Islam took root among their peoples.
The Comoros lie in the northern Mozambique Channel, on the sea roads linking the East African coast, Madagascar and the Arabian and Persian worlds. The first attested inhabitants are now thought to have included Austronesian seafarers who reached the archipelago by boat, with Bantu-speaking peoples from the African mainland present from the beginnings of settlement; the islands were occupied no later than the eighth century CE. Over the following centuries these communities mingled, and the islands took on the Swahili cultural character—an African, Muslim, Indian Ocean civilisation—that has marked them ever since.
Archaeology confirms how early and how deeply the islands were tied to long-distance trade. The Dembeni-phase settlement (named for a site now on Mayotte), occupied from about the ninth to the twelfth centuries, was among the richest sites of its age in the region, yielding Persian and Chinese ceramics, glassware from across the Islamic world and evidence of an export trade including rock crystal that reached the Abbasid Persian Gulf and, later, the Fatimid Mediterranean. The Comoros were thus a node in a commercial web stretching from the Swahili coast to the Middle East and the Far East.
Islam arrived with the merchants and migrants of this trading world and spread through the islands during the early second millennium; Mecca-oriented burials at early sites point to islamisation by the eleventh and twelfth centuries. The faith bound the Comoros to the religious and legal culture of the Swahili coast and the Indian Ocean ummah, and it became—and remains—the central element of Comorian identity. By the close of the medieval period the islands were a settled Muslim society poised to develop its own ruling dynasties.
“An African, Muslim, Indian Ocean civilisation, the Comoros stood on the sea roads between the Swahili coast, Madagascar and Arabia.”
— On the islands' early character
Turning points
- by the 8th century CEPeoples & Migration
Earliest settlement of the islands
Austronesian seafarers and Bantu-speaking peoples from the African mainland settle the archipelago, occupying the islands no later than the eighth century CE and embedding them in Swahili-coast networks.
See the data - 9th–12th centuryEconomy & Trade
Dembeni phase and Indian Ocean trade
The Dembeni-phase settlement flourishes as one of the richest sites of its age in the region, trading rock crystal and other goods with the Abbasid and Fatimid worlds and importing Persian and Chinese ceramics.
See the data - c. 11th–12th centuryReligion
Chapter sources: History of the Comoros, Comoros, Dembeni (archaeological site), Islamic Archaeology in the Comoros: The Swahili and the Rock Crystal Trade with the Abbasid and Fatimid Caliphates, Comoros: History, A history of Grande Comore (Ngazidja) ca. 700–1900
Chapter 02 · c. 15th century – 1841
The Swahili-Muslim Sultanates
Muslim sultanates of Swahili culture rose on Ngazidja, Ndzuwani and Mwali, legitimised by Arab, Persian and Hadhrami genealogies and enriched by Indian Ocean trade—and, increasingly, by slavery.
From around the fifteenth and sixteenth centuries the islands developed their characteristic political form: a patchwork of Muslim sultanates of Swahili culture. Ruling houses on Ngazidja (Grande Comore), Ndzuwani (Anjouan) and Mwali (Mohéli) traced or claimed descent from Arab, Persian ('Shirazi') and later Hadhrami Arab settlers who had intermarried with local elites, using Islamic titles and prestigious genealogies to legitimise their rule. Grande Comore was divided among numerous small sultanates, while Anjouan and Mohéli each tended towards more unified kingships; their towns, with their coral-stone mosques and palaces such as those of Mutsamudu and Domoni on Anjouan, expressed a confident Swahili urban culture.
The islands lived by the sea. Comorian merchants traded rice, foodstuffs, cattle and slaves with the Swahili coast, Madagascar, the Arabian Peninsula and beyond, and the archipelago served as a watering and provisioning station for vessels crossing the western Indian Ocean—including, from the seventeenth and eighteenth centuries, European East India ships. Portuguese navigators had visited in the early sixteenth century, and over time European, Arab and Indian traders all touched at the islands, whose sultans played rivals against one another to preserve their independence.
Slavery was woven into this economy and grew sharply from the late eighteenth century. Devastating slaving raids by Sakalava and Betsimisaraka war-fleets from Madagascar struck the islands between roughly 1785 and 1820, depopulating districts and carrying off captives. At the same time Comorian sultans themselves were deeply involved in the slave trade, both as exporters and as importers of enslaved labour; by the mid-nineteenth century enslaved people are estimated to have formed a very large share of the islands' population. It was into this fragmented, slave-trading world of competing sultanates that France would intervene.
“Ruling houses claimed Arab, Persian and Hadhrami descent, using Islamic titles and genealogies to legitimise their rule.”
— On the Shirazi sultanate tradition
Turning points
- 15th–16th centuryFormation
- early 16th centuryEconomy & Trade
Portuguese and European contact
Portuguese navigators reach the islands in the early sixteenth century; the Comoros become a provisioning station for ships crossing the western Indian Ocean.
See the data - c. 1785–1820War & Rupture
Malagasy slaving raids
Sakalava and Betsimisaraka war-fleets from Madagascar raid the Comoros for captives over several decades, devastating communities across the archipelago.
See the data - mid-19th centuryEconomy & Trade
Slave society on the islands
The slave trade and plantation labour expand greatly, and by the mid-nineteenth century enslaved people are estimated to make up a very large proportion of the islands' population.
See the data
Chapter sources: History of the Comoros, Comoros: History, A history of Grande Comore (Ngazidja) ca. 700–1900, Slavery in the Comoros, The Ujumbe of Mutsamudu, an Eighteenth-Century Swahili Stone House in the Comoros
Chapter 03 · 1841 – 1946
French Colonisation
Beginning with Mayotte in 1841, France brought the archipelago under its control, imposed a plantation economy of vanilla, cloves and ylang-ylang, and administered the islands through Madagascar.
French involvement began with Mayotte. In 1841 the island's ruler, faced with the threat of Malagasy raids and inter-island warfare, ceded Mayotte to France, giving the French a foothold in the archipelago (France formally took possession over the following years). Through the second half of the nineteenth century French planters and trading companies extended their interests to the other islands, and in 1886 France established protectorates over Ngazidja (Grande Comore), Ndzuwani (Anjouan) and Mwali (Mohéli), dealing with sultans such as Said Ali bin Said Omar of Grande Comore.
France moved from protection to possession. In 1908 the islands were attached to the French colony of Madagascar and brought under direct colonial administration; the last reigning sultan stepped aside in 1912, and the archipelago was governed for decades as a dependency of Madagascar rather than as a self-standing colony. Colonial rule reorganised the islands' economy around export agriculture: large concessions, often controlled by French companies, produced vanilla, cloves, copra, sisal and, above all, ylang-ylang, whose fragrant essence made the Comoros a key supplier to the European perfume industry. This plantation system rested on the labour of a population only recently emerging from slavery, and left the islands among the poorest of France's territories.
After the Second World War the islands' status changed. In 1946 the Comoros were detached administratively from Madagascar and made a separate French overseas territory, a step that would be confirmed in the following year and that began, slowly, to give the archipelago its own institutions. The colonial era had unified the four islands under a single administration and tied them economically to France, but it had also entrenched the special position of Mayotte, where French settlement and sentiment ran deepest—a divergence that would prove decisive at independence.
“The fragrant essence of ylang-ylang made the islands a key supplier to the European perfume trade.”
— On the colonial plantation economy
Turning points
- 1841Colonisation
Mayotte ceded to France
The ruler of Mayotte cedes the island to France, giving France its first foothold in the Comoro archipelago.
See the data - 1886Colonisation
Protectorates over the three islands
France establishes protectorates over Grande Comore, Anjouan and Mohéli, dealing with sultans including Said Ali bin Said Omar of Grande Comore.
See the data - late 19th–20th centuryEconomy & Trade
Plantation economy
Colonial rule reorganises the economy around export crops—vanilla, cloves, copra and especially ylang-ylang—making the Comoros a leading supplier of perfume essence.
See the data - 1908Colonisation
Annexation and administration via Madagascar
The islands are formally brought under French possession and attached to the colony of Madagascar; the last sultan relinquishes power by 1912.
See the data - 1946Colonisation
Separate overseas territory
The Comoros are detached from Madagascar and constituted as a distinct French overseas territory, beginning to acquire their own institutions.
See the data
Chapter sources: History of the Comoros, Comoros: History, Said Ali bin Said Omar of Grande Comore, Economy of the Comoros
Chapter 04 · 1946 – 1975
Autonomy and Independence
Granted representation and then internal autonomy, the islands voted for independence in 1974—except Mayotte—and Ahmed Abdallah declared the Comoros independent on 6 July 1975.
Within the postwar French Union the Comoros gained a measure of voice and self-government. Confirmed as an overseas territory in 1947, the islands sent representatives to the French Parliament and acquired their own elected assembly. A loi-cadre and subsequent reforms widened local powers, and in 1961 the territory was granted internal autonomy, with its own governing council and a capital at Moroni. Comorian politicians, among them Said Mohamed Cheikh and later Ahmed Abdallah and Said Mohamed Jaffar, manoeuvred between integration with France and the growing call for full independence.
By the early 1970s an agreement with France set the islands on a path to independence, to be confirmed by referendum. On 22 December 1974 the people of the Comoros voted overwhelmingly in favour of independence—nearly ninety-five per cent across the archipelago—but the result was sharply split by island: on Mayotte a clear majority, of roughly sixty-three per cent, voted to remain part of France. The French National Assembly then held that the islands' status should be settled island by island, a position that opened the way for Mayotte to be treated separately from the other three.
Rather than accept a partition of the archipelago, the Comorian Chamber of Deputies in Moroni, under its president Ahmed Abdallah, unilaterally proclaimed the independence of the Comoros on 6 July 1975, claiming all four islands. Abdallah became the first president of the new state, which was admitted to the United Nations on 12 November 1975 under a resolution affirming the territorial integrity of the whole archipelago, Mayotte included. But independence was immediately fragile: France kept its hold on Mayotte, and within a month Abdallah's government was overthrown, plunging the young republic into a cycle of upheaval.
“Voters backed independence by some 95 per cent—but on Mayotte a clear majority chose to remain French.”
— On the referendum of 22 December 1974
Turning points
- 1947Politics & Power
- 1961Politics & Power
- 22 December 1974Politics & Power
- 6 July 1975Independence
Unilateral declaration of independence
The Chamber of Deputies in Moroni, led by Ahmed Abdallah, declares the Comoros independent, claiming all four islands; Abdallah becomes first president.
See the data - 12 November 1975Politics & Power
Chapter sources: Comoros: History, History of the Comoros, 1974 Comorian independence referendum, State of the Comoros, The Franco-Comorian Territorial Dispute on Mayotte, The Comoros declared an Independent State
Chapter 05 · 1975 – 1996
Coups, Mercenaries and Instability
The young republic endured one of the world's most coup-prone histories, with Ali Soilih's radical rule, the assassination of Ahmed Abdallah, and the recurring shadow of the French mercenary Bob Denard.
Independence ushered in extraordinary turbulence—by common reckoning some twenty coups or attempted coups over the following decades. On 3 August 1975, barely a month after independence, a coalition aided by foreign mercenaries led by Bob Denard overthrew Ahmed Abdallah. Power soon passed to Ali Soilih, a radical young leftist who in 1975–78 pursued a sweeping and confrontational revolution—attacking the authority of the sultans and religious notables, reorganising the state and society, and arming a youth militia. His policies alienated France, the traditional elite and much of the population.
In May 1978 Bob Denard returned with a small mercenary force, toppled Soilih—who was killed shortly afterwards—and restored Ahmed Abdallah to power. The state was reconstituted as the Federal Islamic Republic of the Comoros. Under Abdallah, Denard commanded the Presidential Guard and became a power behind the throne, his influence underwritten by interests linked to apartheid South Africa and to France. This arrangement ended violently: on 26 November 1989 Abdallah was shot dead in his office in Moroni in disputed circumstances, with Denard widely suspected of involvement, though he was later acquitted for lack of evidence. Under French and South African pressure Denard left the islands.
Instability persisted through the 1990s. A multiparty constitution and elections brought Said Mohamed Djohar to the presidency, but his rule was marked by repeated plots. In September 1995 Bob Denard staged his final Comorian adventure, 'Operation Kaskari', seizing Moroni with a band of mercenaries until France intervened militarily in 'Operation Azalée' and removed him within days. The episode underlined how vulnerable the small republic remained to outside adventurers, and how little the central state had been able to consolidate its authority over the islands.
“Some twenty coups or attempted coups, several bearing the fingerprints of the mercenary Bob Denard, marked the republic's first decades.”
— On post-independence instability
Turning points
- 3 August 1975Politics & Power
- 1976–1978Politics & Power
- May 1978Politics & Power
- 26 November 1989Politics & Power
- September–October 1995Politics & Power
Chapter sources: State of the Comoros, Bob Denard, Comoros: History, 1978 Comorian coup d'état, Ahmed Abdallah
Chapter 06 · 1997 – present
The Union and the Mayotte Question
Secession crises on Anjouan and Mohéli were resolved by a 2001 Union constitution with a rotating presidency, while the status of Mayotte—claimed by the Comoros and the UN but administered by France—remains unresolved.
In 1997 the strains within the federation broke into open crisis. Complaining of neglect and misrule from Moroni, the islands of Anjouan and Mohéli declared their separation from the Comoros, with some on Anjouan even seeking a return to French rule. A federal attempt to retake Anjouan by force was routed, and the archipelago slid towards fragmentation. Amid the turmoil, in 1999 the army chief Azali Assoumani seized power in a coup, presenting himself as a guarantor of national unity.
Mediation by the Organisation of African Unity and others produced a settlement. The Fomboni accords, concluded in 2000–2001, were enshrined in a new constitution approved by referendum in 2001, creating the Union of the Comoros: a looser federal state in which each island gained its own president and assembly and substantial autonomy, and in which the Union presidency rotated in turn among Grande Comore, Anjouan and Mohéli. The arrangement held the islands together, though tensions—especially over Anjouan, where a renegade leadership was removed by an African Union–backed operation in 2008—continued to test it. Constitutional changes later modified the rotation and extended presidential terms.
The question of Mayotte remains unresolved. When the other islands became independent in 1975, Mayotte stayed under French administration; France held further votes there, and in a referendum in 2009 the island chose to become a fully integrated French department, a status it assumed in 2011 as France's 101st department. The Comoros, however, continues to claim Mayotte as part of its national territory, and the United Nations General Assembly has repeatedly affirmed Comorian sovereignty over the island and called on France to respect the archipelago's territorial integrity, while France maintains its administration. The dispute, rooted in the divergent votes of 1974–76, endures into the present.
“The Comoros and the UN General Assembly regard Mayotte as Comorian; France administers it as a department. The dispute endures.”
— On the unresolved Mayotte question
Turning points
- since 1976Politics & Power
- 1997War & Rupture
Anjouan and Mohéli secede
Anjouan and Mohéli declare separation from the Comoros; a federal attempt to retake Anjouan by force is defeated, pushing the archipelago towards fragmentation.
See the data - 1999Politics & Power
- 2001Politics & Power
- 29 March 2009Politics & Power
Chapter sources: Comoros: History, Union of Comoros, 2009 Mahoran status referendum, Mayotte, The Franco-Comorian Territorial Dispute on Mayotte, Question of the Comorian island of Mayotte (UN General Assembly resolution)