- Oyo Empire
Oyo Empire before the fourteenth century CE–still existant in 2011 → Capital Oyo-Ile Language(s) Yoruba Religion Yoruba religion Government Constitutional Monarchy Alaafin - legendary Oranyan - 1888-1905 Adeyemi I Alowolodu Legislature Oyo Mesi and Ogboni Historical era Middle Ages - Established before the fourteenth century CE - Disestablished still existant in 2011 Area - 1680 150,000 km2 (57,915 sq mi)
The Oyo Empire was a Yoruba empire of what is today southwestern Nigeria. The empire was established before the 14th century and grew to become one of the largest West African states encountered by European explorers. It rose to preeminence through its possession of a powerful cavalry and wealth gained from trade. The Oyo Empire was the most politically important state in the region from the mid-17th to the late 18th century, holding sway not only over most of the other kingdoms in Yorubaland, but also over neighbouring states, most notable being the Fon Kingdom of Dahomey in the contemporary Republic of Benin.
- 1 Ancient Near Eastern antecedants
- 2 Early Period
- 3 Imperial Period
- 3.1 Reconquest and Expansion
- 3.2 Organization
- 3.3 Political structure
- 3.4 Military
- 3.5 Commerce
- 3.6 Zenith
- 4 Decline
- 5 See also
- 6 Notes
- 7 References
- 8 External links
Ancient Near Eastern antecedants
Traditions of origins
The palace traditionists of Oyo claim that the Yoruba originated from Mecca. In the course of a monotheistic uprising the king Lamarudu is said to have been slain by the people of Braima. However, the crown-prince Oduduwa was able to flee with numerous followers and to find his way to the region of Lake Tchad, to Gobir and then to a spot further south were he founded the city of Ile-Ife. The validity of this account is confirmed by Muhammed Bello who wrote in 1812 CE that the "people of Yoruba are descendants from the Canaanites of the kindred of Nimrod" and that they were driven out "of Iraq, whence they travelled westward and then (southward] to Egypt, Ethiopia until they finally reached Yoruba". 
Exodus from Syria-Palestine
According to recent research in the dynastic tradition of Oyo, the legendary accounts of origin, which have undergone an Arab-Islamic reinterpretion, reflect an exodus of deported people from Syria-Palastine after the fall of the Assyrian Empire in 612 BCE. Owing to the assistance of the Egyptian army during their final struggle, the deported people from the eastern Assyrian provinces who had been resettled in the western provinces of the empire were able to follow the retreat of the Egyptians towards the Nile valley, whence they continued their flight further south.
From Ife to Oyo: Legendary accounts
The legendary origins of the Oyo Empire lie with Oranyan (also known as Oranmiyan), the second prince of the Yoruba Kingdom of Ile-Ife (Ife). Oranyan made an agreement with his brother to launch a punitive raid on their northern neighbors for insulting their father Oba (King) Oduduwa, the first Ooni of Ife. On the way to the battle, the brothers quarreled and the army split up. Oranyan's force was too small to make a successful attack, so he wandered the southern shore until reaching Bussa. There the local chief entertained him and provided a large snake with a magic charm attached to its throat. The chief instructed Oranyan to follow the snake until it stopped somewhere for seven days and disappeared into the ground. Oranyan followed the advice and founded Oyo where the serpent stopped. The site is remembered as Ajaka. Oranyan made Oyo his new kingdom and became the first "oba" (meaning 'king' or 'ruler' in the Yoruba language) with the title of "Alaafin of Oyo" (Alaafin means 'owner of the palace' in Yoruba), leaving all his treasures in Ife and allowing another king named Adimu to rule there.
Oranyan, the first oba (king) of Oyo, was succeeded by Oba Ajaka, Alaafin of Oyo. Ajaka was deposed, because he lacked Yoruba military virtue and allowed his sub-chiefs too much independence. Leadership was then conferred upon Ajaka's brother, Shango, who was later deified as the deity of thunder and lightning. Ajaka was restored after Shango's death. Ajaka returned to the throne thoroughly more warlike and oppressive. His successor, Kori, managed to conquer the rest of what later historians would refer to as metropolitan Oyo. According to recent research, this account recorded by Johnson in Oyo at the end of the nineteenth century reflects events in the Ancient Near East which occurred in the ninth century BC.
The heart of metropolitan Oyo was its capital at Oyo-Ile, (also known as Katunga or Old Oyo or Oyo-oro). The two most important structures in Oyo-Ile was the 'afin' or palace of the Oba and his market. The palace was at the center of the city close to the Oba's market called 'Oja-oba'. Around the capital was a tall earthen wall for defense with 17 gates. The importance of the two large structures (the palace and the Oja Oba) signified the importance of the king in Oyo.
Oyo had grown into a formidable inland power by the end of the 14th century. For over a century, the Yoruba state had expanded at the expense of its neighbors. Then, during the reign of Onigbogi, Oyo suffered military defeats at the hands of the Nupe led by Tsoede. Sometime around 1535, the Nupe occupied Oyo and forced its ruling dynasty to take refuge in the kingdom of Borgu. The Nupe went on to sack the capital, destroying Oyo as a regional power until the early 17th century.
Oyo went through an interrugnum of 80 years as an exiled dynasty after its defeat by the Nupe. Oyo then reemerged, more centralized and expansive than ever. It would not be satisfied with simply retaking Oyo but with the establishment of its power over a vast empire. During the 17th century Oyo began a long stretch of growth, becoming a major empire. Oyo never encompassed all Yoruba-speaking people but it was by far the most populous kingdom in Yoruba history.
Reconquest and Expansion
The key to Yoruba reconquest of Oyo would be a stronger military and a more centralized government. Taking a cue from their Nupe enemies (whom they called "Tapa"), the Yoruba rearmed not only with armor but cavalry. Oba Ofinran, Alaafin of Oyo, succeeded in regaining Oyo's original territory from the Nupe. A new capital, Oyo-Igboho, was constructed, and the original became known as Old Oyo. The next oba, Egunoju, conquered nearly all of Yorubaland. After this, Oba Orompoto led attacks to obliterate the Nupe to ensure Oyo was never threatened by them again. During the reign of Oba Ajiboyede was the first Bere festival, an event that would retain much significance among the Yoruba long after the fall of Oyo. And it was under his successor, Abipa, that the Yoruba were finally compelled to repopulate Oyo-Ile and rebuild the original capital. Despite a failed attempt to conquer the Benin Empire sometime between 1578 and 1608, Oyo continued to expand. The Yoruba allowed autonomy to the southeast of metropolitan Oyo where the non-Yoruba areas could act as a buffer between Oyo and Imperial Benin. By the end of the 16th century, the Ewe and Aja states of modern Benin were paying tribute to Oyo.
The Dahomey Wars
The reinvigorated Oyo Empire began raiding southward at least as early as 1682. By the end of its military expansion, Oyo's borders would reach to the coast some 200 miles southwest of its capital. It met very little serious opposition after its failure against Benin until the early 18th century. In 1728, the Oyo Empire invaded the Kingdom of Dahomey in a major and bitter campaign. The force that invaded Dahomey was entirely composed of cavalry. Dahomey, on the other hand, possessed no cavalry but many firearms. These firearms proved effective in scaring the horses of Oyo's cavalry and preventing them charging. Dahomey's army also built fortifications such as trenches, which forced the Oyo army to fight as infantry. The battle lasted four days, but the Yoruba were eventually victorious after their reinforcements arrived. Dahomey was forced to pay tribute to Oyo after the latter's hard-fought victory. This would not end the fighting, however, and the Yoruba would invade Dahomey a total of seven times before the little kingdom was fully subjugated in 1748.
Oyo's cavalry enabled them to launch campaigns of conquest and suppression over great distances. The Oyo army also proved capable of surmounting fortifications but had to withdraw when supplies ran out to feed the army. It is also notable that Oyo didn't use guns in its major conquest. Furthermore, guns were little use against Oyo's army, which is possibly why they waited until the 19th century to adopt them. In 1764, a joint Oyo-Dahomey force crushed an Asante army. The Oyo victory would define borders between the two states. Oyo led a successful campaign into Mahi territory north of Dahomey in the late 18th century. The Yoruba also used the forces of their tributaries. A striking example of this is the 1784 naval blockade by an Oyo-Dahomey-Lagos force of Badagri.
The original incarnation of Oyo consisted of metropolitan Oyo and little more. But with the advent of its imperial expansion, Oyo was reorganized to better manage its vast holdings within and outside of Yorubaland. It was divided into four layers defined by relation to the core of the empire. These layers were Metropolitan Oyo, southern Yorubaland, the Egbado Corridor and Ajaland.
Metropolitan Oyo corresponded, more or less, to the Oyo state prior to the Nupe invasion. This was the hub of the empire where the Yoruba spoke the Oyo dialect. Metropolitan Oyo was divided into six provinces with three on the west side of the Ogun River and three to the river's east. Each province was supervised by a governor appointed directly by the Alaafin of Oyo.
The second layer of the empire was composed of the towns closest to Oyo-Ile, whom were recognized as brothers. This area was south of metropolitan Oyo, and its Yoruba inhabitants spoke different dialects from that of Oyo. These tributary states were led by their own rulers titled Obas. These vassal courts were headed by their native leaders (according to local custom) but had to be confirmed by the Alaafin of Oyo.
The empire's third layer was the Egbado Corridor southwest of Yorubaland. This area was inhabited by the Egba and Egbado and was very valuable in respect to Oyo's trade with the coast. The Egba and Egbado tributaries were allowed, like their Yoruba counterparts, to rule themselves. They were, however, supervised by Ajele. These were agents appointed by the Alaafin of Oyo to oversee his interest and monitor commerce. The lead representative of Oyo in the corridor was the Olu, ruler of the town of Ilaro.
Ajaland was the last layer added to the empire and also the most restive since tribute could only be exacted by threat of far-flung expeditions. This territory extended from the non-Yoruba areas west of the Egbado Corridor far into Ewe controlled territory in modern Togo. This area, like all tributary states, was allowed a fair degree of autonomy as along as taxes were paid, the orders from Oyo were strictly followed and access to local markets was made available to Oyo merchants. Tribute was often taken in slaves, and if that meant the tributary had to make war on someone to get them (as with Dahomey), so be it. To disobey commands sent from Oyo meant wholesale slaughter of the community, as occurred in Allada in 1698.
The Oyo Empire developed a highly sophisticated political structure to govern its territorial domains. It is unknown precisely how much of this structure existed prior to the Nupe invasion. Some of Oyo's institutions are clearly derivative of early accomplishments in Ife. After reemerging from exile in the early 17th century, Oyo took on a noticeably more militant character. The influence of an aggressive Yoruba culture is exemplified in the standards placed on the oba (king) and the roles of his council.
The Alaafin of Oyo
The oba (meaning 'king' in the Yoruba language) at Oyo who was referred to as the Alaafin of Oyo, (Alaafin means 'owner of the palace' in Yoruba), was the head of the empire and supreme overlord of the people. He was responsible for keeping tributaries safe from attack, settling internal quarrels between sub-rulers, and mediating between those sub-rulers and their people. The Alaafin of Oyo was also expected to lavish his subordinates with honors and gifts. In return, all sub-rulers had to pay homage to the Oba and renew their allegiance at annual ceremonies. The most important of these was the Bere festival marking the acclimation of successful rule by the Alaffin. After the Bere festival there was supposed to be peace in Yorubaland for three years.
Selection of the Alaafin
The Oyo Empire was not a hereditary monarchy, nor an absolute one. The Alaafin of Oyo was carefully selected by the Oyo Mesi and was not always directly related to his predecessor, though he did have to be descended from Oranyan (also known as Oranmiyan), a son of Oduduwa (also known as Odudua and Odua ) and to hail from the Ona Isokun ward (which is one of the three royal wards). At the beginning of the Oyo Empire it was usually the Alaafin's oldest son that succeeded his father to the throne. However, this sometimes led to the oldest son i.e. the first born prince, the Aremo, hastening the death of his father. Independently of the possible succession to his father, the Aremo was quite powerful in his own right. For instance, by custom the Alaafin abstained from leaving the palace, except during the important festivals, which curtailed his power in practice. By contrast, the Aremo often left the palace. This led noted historian Johnson to observe: "The father is the king of the palace, and the son the King for the general public". The two councils which checked the Alaafin had a tendency to select a weak Alaafin after the reign of a strong one to keep the office from becoming too powerful.
Certain religious and government officials, usually eunuchs, were appointed by the Alaafin of Oyo. These officials were known as the ilari or half-heads because of the custom of shaving half of their heads and applying what was believed to be a magical substance into it. There were hundreds of Ilari divided evenly among the sexes. Junior members of the Ilari did menial tasks while seniors acted as guards or sometimes messengers to the other world via sacrifice. They had titles referencing the king such as oba l'olu ("the king is supreme") or madarikan ("do not oppose him"). They also carried fans of green or red as credentials.
All sub-courts of Oyo had Ilari who acted as both spies and taxmen Oyo appointed these to visit and sometimes reside in Dahomey and the Egbado Corridor to collect taxes and spy on Dahomey's military successes so that the Alaafin of Oyo could get his cut. Similar, though far older, officials existed in Ife as attested by terracotta art depicting them.
While the Alaafin of Oyo was supreme overlord of the people, he was not without checks on his power. The Oyo Mesi and the Yoruba Earth cult known as Ogboni kept the Oba's power in check. The Oyo Mesi spoke for the politicians while The Ogboni spoke for the people backed by the power of religion. The power of the Alaafin of Oyo in relation to the Oyo Mesi and Ogboni depended on his personal character and political shrewdness.
The Oyo Mesi
The Oyo Mesi were seven principal councilors of the state. They constitute the Electoral Council and possess legislative powers close to that of today's United States Congress. The Bashorun, Agbaakin, Samu, Alapini, Laguna, Akiniku and a Ashipa are the seven members of this council. They represent the voice of the nation and on them rests the chief responsibility of protecting the interest of the empire. The Alafin must take counsil with them whenever any important matter affecting the state occurs. each of them has a state duty to perform at court every morning and afternoon and a special deputy, attached to them whom they send to the Alafin at the other times when their absence is unavoidable.
Their political power was tied to their control of the military. The head of the council, The Bashuron, consulted the Ifa oracle for approval from the gods. Thus, new alafins of Oyo were seen as appointed by the gods. They were regarded as "Ekeji Orisa" meaning "companion of the gods." The Bashuron was a sort of prime minister. He has the final say on the nomination of the new Alafin. The Oyo Mesi was organized in order to have a check on the Alafin's power. Before making a political decision, the Alafin was required to consult first with the Oyo Mesi. The control of the Oyo Mesi was so great that the Bashorun's powermrivaled that of the Alafin himself. For example, the Bashorun served as the commander in chief of the army and orchestrated many religious festivals, positions which granted him both militaristic and religious authority above the king.
The most important job of the Oyo Mesi was the selection of the Alafin.
The Oyo Mesi does not enjoy an absolute power or influence, and while the Oyo Mesi may wield political influence, the Ogboni represented the popular opinion backed by the authority of religion, and therefore the view of the Oyo Mesi could be moderate by the Ogboni. And most interestingly, there are checks and balances on the power of the Alafin and the Oyo Mesi and thus no one is arrogated absolute power. The Ogboni was a very powerful secret society composed of freemen noted for their age, wisdom and importance in religious and political affairs. Its members enjoyed immense power over the common people due to their religious station. A testament to how widespread the institution was is the fact that there were Ogboni councils at nearly all sub-courts within Yorubaland. Aside from their duties in respect to the worship of the earth, they were responsible for judging any case dealing with the spilling of blood. The leader of the Ogboni, the Oluwo, had the unqualified right of direct access to the Alaafin of Oyo on any matter.
Removing an Alaafin of Oyo
Chief among the responsibilities of the Bashorun was the all important festival of Orun. This religious divination, held every year, was to determine if the members of the Mesi still held favor with the Alafin. If the council decided on the disapproval of the Alafin, the Bashorun presented the Alafin with an empty calabash, or parrot's egg as a sign that he must commit suicide. This was the only way to remove the Alafin because he could not be legally deposed. Once given the parrot's egg, the Bashorun would proclaim, "the gods reject you, the people reject you, the earth rejects you." The Alafin, his eldest son, and the Samu, his personal counselor and a member of the Oyo Mesi all had to commit suicide in order to renew the government all together. The process and suicide ceremony took place during the Orun festival.
There was a high degree of professionalism in the army of the Oyo Empire. Its military success was due in large part to its cavalry as well as the leadership and courage of Oyo officers and warriors. Because its main geographic focus was north of the forest, Oyo enjoyed easier farming and thus a steady growth in population. This contributed to Oyo's ability to consistently field a large force. There was also an entrenched military culture in Oyo where victory was obligatory and defeat carried the duty of committing suicide. This do-or-die policy no doubt contributed to the military aggressiveness of Oyo's generals.
The Oyo Empire was the only Yoruba state to adopt cavalry; it did so because most of its territory was in the northern savannah. The origin of the cavalry is disputed; however, the Nupe, Borgu and Hausa in neighboring territories also used cavalry and may have had the same historical source. Oyo was able to purchase horses from the north and maintain them in metropolitan Oyo because of partial freedom from the tsetse fly. Cavalry was the long arm of the Oyo Empire. Late 16th and 17th century expeditions were composed entirely of cavalry. There were drawbacks to this. Oyo could not maintain its cavalry army in the south but could raid at will.
Cavalry in highly developed societies such as Oyo was divided into light and heavy. Heavy cavalry on larger imported horses was armed with heavy thrusting lances or spears and also with swords. Light cavalry on smaller indigenous ponies was armed with throwing spears or bows. Oyo's cavalry forces included not only nobles, the norm in West African warfare, but foreign slaves from the Hausa, Nupe and Bornu states.
Infantry in the region around the Oyo Empire was uniform in both armor and armament. All infantry in the region carried shields, swords and lances of one type or another. Shields were four feet tall and two feet wide and made of elephant or ox hide. A 3-foot-long (0.91 m) heavy sword was the main armament for close combat. The Yoruba and their neighbors used triple barbed javelins which could be thrown accurately from about 30 paces.
The Oyo Empire, like many empires before it, used both local and tributary forces to expand its domains. The structure of the Oyo military prior to its imperial period was simple and closer aligned to the central government in metropolitan Oyo. This may have been fine in the 15th century when Oyo controlled only its heartland. But to make and maintain farther conquest, the structure underwent several changes.
Oyo maintained a semi-standing army of specialist cavalry soldiers called the Eso or Esho. These were 70 junior war chiefs who were nominated by the Oyo Mesi and confirmed by the Alaafin of Oyo. The Eso were appointed for their military skill without regard to heritage and were led by the Are-Ona-Kakanfo.
After Oyo's return from exile, the post of Are-Ona-Kakanfo was established as the supreme military commander. He was required to live in a frontier province of great importance to keep an eye on the enemy and to keep him from usurping the government. During Oyo's imperial period, the Are-Ona-Kakanfo personally commanded the army in the field on all campaigns.
The Metropolitan Army
Since the Are-Ona-Kakanfo could not reside near the capital, arrangements had to be made for the latter's protection in case of emergency. Forces inside metropolitan Oyo were commanded by the Bashorun, leading member of the Oyo Mesi. As stated earlier, Metropolitan Oyo was divided into six provinces divided evenly by a river. Provincial forces were thus grouped into two armies, under the Onikoyi and the Okere for the east and west side of the river respectively. Lesser war chiefs were known as Balogun, a title carried on by the soldiers of Oyo's successor state, Ibadan.
The Tributary Army
Tributary leaders and provincial governors were responsible for collecting tribute and contributing troops under local generalship to the imperial army in times of emergency. Occasionally, tributary leaders would be ordered to attack neighbors even without the backing of the main imperial army. These forces were often utilized in Oyo's more distant campaigns on the coast or against western states like Asanteman or the Mahi.
Oyo became the southern emporium of the Trans-Saharan trade. Exchanges were made in salt, leather, horses, kola nuts, ivory, cloth and slaves. The Yoruba of metropolitan Oyo were also highly skilled in craft making and iron work. Aside from taxes on trade products coming in and out of the empire, Oyo also became wealthy off the taxes imposed on its tributaries. Taxes on the kingdom of Dahomey alone brought in an amount estimated at 638 thousand dollars a year.
Oyo's imperial success made Yoruba a lingua franca almost to the shores of the Volta. Toward the end of the 18th century, the Oyo army was neglected as there was less need to conquer. Instead, Oyo directed more effort towards trading and acted as middlemen for both the Trans-Saharan and Trans-Atlantic slave trade. Europeans bringing salt arrived in Oyo during the reign of King Obalokun. Thanks to its domination of the coast, Oyo merchants were able to trade with Europeans at Porto Novo and Whydah. Here the Oyo Empire's captives and criminals were sold to Dutch and Portuguese buyers.
By 1680, the Oyo Empire spanned over 150,000 square kilometers. It reached the height of its power in the 18th century. And despite its violent creation, it was held together by mutual self-interest. The government was able to provide unity for a vast area through a combination of local autonomy and imperial authority.
Unlike the great savannah empires, of which Oyo may not be called a successor since it was a successor of Ife, there was little if any Muslim influence in the empire. It is known that at least some Muslim officials were kept in Metropolitan Oyo, and men capable of writing and calculating in Arabic were reported by French traders in 1787.
The end of the 18th century marked the beginning of the Oyo Empire's downfall. In around 1789, Oba Abiodun is believed to have been killed by his son and successor, Awole. A series of constitutional upheavals, dynastic intrigues and local particularism weakened the empire. In 1796, Oba Awole was ousted by the government in an Illorin-centered revolt initiated by Afonja, the Are Ona Kakanfo. The revolt led to the secession of Ilorin, a Yoruba state that would play a crucial role in the destruction of Oyo. At his rejection by the council, he is said to have cursed the empire as he prepared to commit suicide. After firing arrows in all directions he proclaimed:
"My curse be on you and your disloyalty and your disobedience, so let your children disobey you. If you send them on an errand, let them never return to bring you word again. To all points I shot my arrows, you will be carried as slaves. My curse will carry to the sea and beyond the seas. Slaves will rule over you, and you their masters will become slaves. Broken calabash can be mended but not a broken dish; so let my words be irrevocable."
Loss of the Egbado Corridor
As Oyo tore itself apart via political intrigue, its vassals began taking advantage of the situation to press for independence. The Egba, under the leadership of Lishabi, massacred the Ilari stationed in their area and drove off an Oyo punitive force.
The Dahomey Revolt
When Dahomey's King Gezo ascended the throne in 1818, he offered only a tiny piece of cloth and 2 bags of cowries to the Oyo tax collector saying that anything else would be disproportionate to Dahomey's wealth. When four more envoys were sent from Oyo, Gezo had them beheaded. An Oyo army was deployed and decisively defeated, ending Oyo's hegemony over Dahomey. After gaining its independence, Dahomey began raiding the corridor.
The Fulani Jihad
After Awole's rejection, Afonja, now master of Illorin, invited an itinerant Fulani scholar of Islam called Alim al-Salih into his ranks. By doing this, he hoped to secure the support of Yoruba Muslims (mainly slaves taking care of the Empire's horses) and volunteers from the Hausa-Fulani north in keeping Ilorin independent. Torn by internal struggle, Oyo could not defend itself against the Fulani. Oyo-Ile was razed by the Fulani Empire in 1835 and the Oyo Empire collapsed in 1836, once Afonja had been killed by the Fulani. Up to this day, the Illorin traditional ruler is an emir, whereas in the rest of Yoruba towns the kings are called oba or baale (Baale or Baba Onile meaning "father of the land" or "lord of the land").
After the destruction of Oyo-Ile, the capital was moved further south, to Ago d'Oyo. Oba Atiba sought to preserve what remained of Oyo by placing on Ibadan the duty of protecting the capital from the Ilorin in the north and northeast. He also attempted to get the Ijaye to protect Oyo from the west against the Dahomeans. The center of Yoruba power moved further south to Ibadan, a Yoruba war camp settled by Oyo commanders in 1830.
Atiba's gambit failed, and Oyo never regained its prominence in the region. It became a protectorate of Great Britain in 1888 before further fragmenting into warring factions. The Oyo state ceased to exist as any sort of power 1896. He died in died in 1905. (Oba Atiba otherwise called Atiba Atobatele did not die in 1905. He died in 1859; It was his son Adeyemi I and the 3rd Alaafin to rule in the present Oyo who died in 1905 (See List of rulers of the Yoruba state of Oyo). During the colonial period, the Yoruba's were one of the most urbanized groups in Africa. About 22% of the population lived in large areas with population exceeding 100,000 and over 50% lived in cities of made up of 25,000 or more people. The index of urbanization in 1950 was close to that of the United States, excluding Ilorin. The Yoruba continue to be the most urbanised African ethnic group today. Old Oyo linked cities such as Ibadan, Osogbo, and Ogbomoso, which were some of the major cities that flourished after the collapse.
- Rulers of the Yoruba state of Oyo
- History of Nigeria
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