Guinea-Bissau, officially the Republic of Guinea-Bissau, is a country in West Africa that covers with an estimated population of 2,080,000. It borders Senegal to its north and Guinea to its southeast.
Guinea-Bissau was once part of the kingdom of Kaabu, as well as part of the Mali Empire. Parts of this kingdom persisted until the 18th century, while a few others had been under some rule by the Portuguese Empire since the 16th century. In the 19th century, it was colonised as Portuguese Guinea. Upon independence, declared in 1973 and recognised in 1974, the name of its capital, Bissau, was added to the country's name to prevent confusion with Guinea (formerly French Guinea).
Guinea-Bissau has had a history of political instability: following the bloody but ultimately successful war of independence, the winning PAIGC established a one-party socialist state, which was under military control from 1984 to 1994, when free multiparty elections were held. Several successful military coups have since interrupted peaceful transfer of power, most recently the 2025 coup, which installed the currently ruling military junta, headed by the transitional president Horta Inta-A Na Man.
About 2% of the population speaks Portuguese, the official language, as a first language, and 33% speak it as a second language. Guinea-Bissau Creole, a Portuguese-based creole, is the national language and also considered the language of unity. According to a 2012 study, 54% of the population speak Creole as a first language and about 40% speak it as a second language. The remainder speak a variety of native African languages. The nation is home to numerous followers of Islam, Christianity, and multiple traditional faiths. The country's GDP per capita is one of the lowest in the world.
Guinea-Bissau is a member of the United Nations, Organisation of Islamic Cooperation, Community of Portuguese Language Countries, , Alliance of Small Island States and the South Atlantic Peace and Cooperation Zone. It was also a member of the now-defunct Latin Union. As of November 2025, its membership in Economic Community of West African States and African Union has been suspended after a coup d'etat.
History
Pre-European contact
The ancient history of what is now Guinea-Bissau is poorly understood by historians. The earliest inhabitants were the Jola, Papel, Manjak, Balanta, and Biafada peoples. Later the Mandinka and Fulani migrated into the region in the 13th and 15th centuries respectively. They pushed the earlier inhabitants towards the coast and onto the Bijagos islands.
The Balanta and Jola had weak or non-existent institutions of kingship but emphasised decentralization, with power invested in heads of villages and families. The Mandinka, Fula, Papel, Manjak, and Biafada chiefs were vassals to kings. The customs, rites, and ceremonies varied, but nobles commanded all the major positions, including the judicial system. Social stratification was seen in the clothing and accessories of the people, in housing materials, and in transportation options. Trade was widespread between ethnic groups. Items traded included pepper and kola nuts from the southern forests; iron and iron utensils from the savannah-forest zone; salt and dried fish from the coast; and Mandinka cotton cloth.
Kingdom of Bissau According to oral tradition, the Kingdom of Bissau was founded by the son of the king of Quinara (Guinala), who moved to the area with his pregnant sister, six wives, and subjects of his father's kingdom. Relations between the kingdom and the Portuguese colonisers were initially warm, but deteriorated over time. The kingdom strongly defended its sovereignty against the Portuguese 'Pacification Campaigns', defeating them in 1891, 1894, and 1904. However, in 1915 the Portuguese under the command of Officer Teixeira Pinto and warlord Abdul Injai fully absorbed the kingdom.
Biafada kingdoms The Biafada people inhabited the area around the Rio Grande de Buba in three kingdoms: Biguba, Guinala, and Bissege. The former two were important ports with significant lançado communities. They were subjects of the Mandinka mansa of Kaabu.
Bijagos Islands In the Bijagos Islands, people of different ethnic origins tended to settle in separate settlements. Great cultural diversity developed in the archipelago.
Bijago society was warlike. Men were dedicated to boatbuilding and raiding the mainland, attacking the coastal peoples as well as other islands. They believed that at sea they had no king. Women cultivated the land, constructed houses, and gathered and prepared foods. They could choose their husbands, and warriors with the best reputations ranked at the top of respected status. Successful warriors could have many wives and boats, and were entitled to one third of the spoils gained by warriors who used their boats in any expedition.
Bijago night raids on coastal settlements had significant effects on the societies attacked. Portuguese traders on the mainland tried to stop the raids, as they hurt the local economy. But the islanders also sold considerable numbers of villagers captured in raids as slaves to the Europeans. With colonisation underway in other parts of Africa and the Americas, demand for workers was high and the Europeans sometimes pushed for more captives to be taken.
The Bijagos were mostly safe from enslavement, as they were out of reach of mainland slave raiders. Europeans avoided having them as slaves. Portuguese sources say the children made good slaves but not the adults, who were likely to commit suicide, lead rebellions aboard slave ships, or escape once reaching the New World.
Kaabu
Kaabu was established first as a province of Mali through the conquest in the 13th century of the Senegambia by Tiramakhan Traore, a general under Sundiata Keita. By the 14th century much of Guinea Bissau was under the administration of Mali. It was ruled by a farim kaabu (commander of Kaabu).
Mali declined gradually, beginning in the 14th century. By the early 16th century, the expanding power of Koli Tenguella cut off formerly secure Mali.
Kaabu became an independent federation of kingdoms. The ruling classes were composed of elite warriors known as the Nyancho (Ñaanco) who traced their patrilineal lineage to Tiramakhan Traore. The Nyancho were a warrior culture, reputed to be excellent cavalry men and raiders. The Kaabu Mansaba was seated in Kansala, in what is today the Gabú region.
The slave trade dominated the economy, and the warrior classes grew rich with imported cloth, beads, metalware, and firearms. Trade networks with Arabs and others to North Africa were dominant up to the 14th century. In the 15th century, coastal trade with the Europeans began to increase. In the 17th and 18th centuries an estimated 700 slaves were exported annually from the region, many of them from Kaabu.
In the late 18th century, the rise of the Imamate of Futa Jallon to the east posed a powerful challenge to the animist Kaabu. During the first half of the 19th century, civil war erupted as local Fula people sought independence. This long-running conflict was marked by the 1867 Battle of Kansala; the Fuladu effectively defeated the Kaabu and dominated the area thereafter. But some smaller Mandinka kingdoms survived until their absorption into Portuguese colonies.
European contact
15th–16th centuries The first Europeans to reach Guinea-Bissau were the Venetian explorer Alvise Cadamosto in 1455, Portuguese explorer Diogo Gomes in 1456, Portuguese explorer Duarte Pacheco Pareira in the 1480s, and Flemish explorer Eustache de la Fosse in 1479–1480.
Although the Portuguese authorities initially discouraged European settlement on the mainland, this prohibition was ignored by lançados and tangomãos, who largely assimilated into indigenous culture and customs. They ignored Portuguese trade regulations that banned entering the region or trading without a royal licence, shipping out of unauthorised ports, or assimilating into the native community.
After 1520 trade and settlements increased on the mainland, populated by Portuguese and native traders, as well as some Spanish, Genoese, English, French, and Dutch. The main ports were Cacheu, Bissau, and Guinala. Each river also had such trading centers as Toubaboudougou at their fall lines, the furthest navigable point. These posts traded directly with the peoples of the interior for resources such as gum arabic, ivory, hides, civet, dyes, enslaved Africans, and gold. Local African rulers generally refused to allow Europeans into the interior, to ensure their own control of trade routes and goods.
Disputes became increasingly frequent and serious in the late 1500s as the foreign traders sought to influence the host societies to their benefit. Meanwhile, the Portuguese monopoly, always leaky, was being increasingly challenged. In 1580 the Iberian Union unified the crowns of Portugal and Spain. Spain's enemies launched attacks on Portuguese possessions in Guinea Bissau and Cape Verde. French, Dutch, and English ships increasingly came to trade with the natives and the independent-minded lançados.
17th–18th centuries
In the early 17th century the government attempted to force all Guinean trade to go through Santiago, and to promote trade and settlement on the mainland, while restricting the sale of weapons to the locals. These efforts were largely unsuccessful. With the end of the Iberian Union in 1640, King João IV attempted to restrict the Spanish trade in Guinea that had flourished for the previous 60 years. Afro-Portuguese traders and colonists, however, were not in a position to deny the free trade that the African kings demanded, as they had come to rely on European products and goods as necessities.
The Portuguese were never able to maintain the monopoly they wanted; the economic interests of the native leaders and Afro-European traders and merchants never aligned with theirs. During this period the power of the Mali Empire in the region was dissipating. The farim of Kaabu, the king of Kassa, and other local rulers began to assert their independence. In the early 1700s the Portuguese abandoned Bissau and retreated to Cacheu after the captain-major was captured and killed by the local king. They did not return until the 1750s. Meanwhile, the Cacheu and Cape Verde Company shut down in 1706. For a brief period in the 1790s, the British tried to establish a foothold on Bolama Island.
Slave trade Guinea-Bissau was among the first regions whose people engaged in the Atlantic slave trade. For centuries its warriors had sent captives as slaves to North Africa. While it did not produce the same number of enslaved people to export to the Americas as other regions, the effects were still significant.Gale Group. (2017). "Guinea-Bissau." In M. S. Hill (Ed.), Worldmark encyclopedia of the nations (14th ed., Vol. 2, pp. 379–392). Gale. In Cape Verde, Guinean slaves were instrumental in developing the labor-intensive plantation economy: they cultivated and processed, growing indigo and cotton, and also wove the panos cloth that became a standard currency in West Africa. During the 17th and 18th centuries, thousands of captive Africans were taken from the region every year; an average of 3000 persons were shipped every year from Guinala alone. Many of these captives were taken during the Fula jihads and, specifically, the wars between the Imamate of Futa Jallon and Kaabu.