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A map shows the locations of the major West African empires before 1492, including the Ghana Empire; Mali Empire; Kanem Empire; Yoruba Empire; Benin Empire; Songhay Empire; Bachwezi Empire; Great Zimbabwe Empire; Carthaginian Empire; Persian Achaemenid Empire; Fatimid Caliphate; and Umayyad Caliphate.
This map shows the locations of the major West African empires before 1492. Along the Mediterranean coast, Muslim states prevailed.

By 1200 CE, under the leadership of Sundiata Keita, Mali had replaced Ghana as the leading state in West Africa. After Sundiata’s rule, the court converted to Islam, and Muslim scribes played a large part in administration and government. Miners then discovered huge new deposits of gold east of the Niger River. By the fourteenth century, the empire was so wealthy that while on a hajj , or pilgrimage to the holy city of Mecca, Mali’s ruler Mansu Musa gave away enough gold to create serious price inflation in the cities along his route. Timbuktu, the capital city, became a leading Islamic center for education, commerce and the slave trade. Meanwhile, in the east, the city of Gao became increasingly strong under the leadership of Sonni Ali and soon eclipsed Mali’s power. Timbuktu sought Ali’s assistance in repelling the Tuaregs from the north. By 1500, however, the Tuareg empire of Songhay had eclipsed Mali, where weak and ineffective leadership prevailed.

The role of slavery

The institution of slavery is not a recent phenomenon. Most civilizations have practiced some form of human bondage and servitude, and African empires were no different ( [link] ). Famine or fear of stronger enemies might force one tribe to ask another for help and give themselves in a type of bondage in exchange. Similar to the European serf system, those seeking protection, or relief from starvation, would become the servants of those who provided relief. Debt might also be worked off through a form of servitude. Typically, these servants became a part of the extended tribal family. There is some evidence of chattel slavery    , in which people are treated as personal property to be bought and sold, in the Nile Valley. It appears there was a slave-trade route through the Sahara that brought sub-Saharan Africans to Rome, which had slaves from all over the world.

An illustration shows traders transporting a group of slaves, who are connected at the neck and bound at the wrists.
Traders with a group of slaves. Note how the slaves are connected at the neck. Muslim traders brought slaves to the North African coast, where they might be sent to Europe or other parts of Africa.

Arab slave trading, which exchanged slaves for goods from the Mediterranean, existed long before Islam’s spread across North Africa. Muslims later expanded this trade and enslaved not only Africans but also Europeans, especially from Spain, Sicily, and Italy. Male captives were forced to build coastal fortifications and serve as galley slaves. Women were added to the harem.

The major European slave trade began with Portugal’s exploration of the west coast of Africa in search of a trade route to the East. By 1444, slaves were being brought from Africa to work on the sugar plantations of the Madeira Islands, off the coast of modern Morocco. The slave trade then expanded greatly as European colonies in the New World demanded an ever-increasing number of workers for the extensive plantations growing tobacco, sugar, and eventually rice and cotton ( [link] ).

Questions & Answers

Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
Kate Reply
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Kate Reply
what is the change in momentum of a body?
Eunice Reply
what is a capacitor?
Raymond Reply
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
Maria Reply
please solve
Sharon
8m/s²
Aishat
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
Saheed Reply
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
Ramon Reply
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
definitely of physics
Haryormhidey Reply
how many start and codon
Esrael Reply
what is field
Felix Reply
physics, biology and chemistry this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
WISDOM Reply
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
Belty Reply
a=v/t. a=f/m a
IHUMA
innocent
Adah
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
Nassze Reply
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
JALLAH Reply
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you. Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
What is specific heat capacity
Destiny Reply
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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Source:  OpenStax, U.s. history. OpenStax CNX. Jan 12, 2015 Download for free at http://legacy.cnx.org/content/col11740/1.3
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