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      The expansion of the Transatlantic Slave Trade

      Lesson details

      Learning outcome

      I can explain how the Transatlantic Slave Trade grew and destabilised West African kingdoms.

      Key learning points

      1. Conflicts between local kingdoms would lead to prisoners of war who would be sold as enslaved people.
      2. The European involvement in the Slave trade led to more conflicts in West Africa leading to more enslaved people.
      3. Some kingdoms, like the kingdom of Benin, refused to trade with Europeans but would struggle as other kingdoms profited.
      4. Some African kingdoms, like the Allada kingdom, became reliant on trade with the Europeans for power and wealth.
      5. The nature of the trade in enslaved people changed, it was no longer just prisoners of war sold into slavery.

      Keywords

      • Enslaved people - enslaved people are people who have been forced to work without pay, lose their freedom and become the property of another person

      • Oba - Oba is the word used in the Benin Empire to describe the figure who was both ruler and spiritual leader

      • Prisoners of war - prisoners of war are people captured by the opposing side during a war

      Common misconception

      All African kingdoms and rulers willingly participated in the Transatlantic Slave Trade.

      Some kingdoms did cooperate, but many - like the Kingdom of Benin - also tried to resist by refusing to trade enslaved people.

      Teacher tip

      When explaining how more trade, led to more enslaved people, this is a good point to emphasise that an important change in the expansion of the slave trade was the increase in kidnapping and not necessarily an increase in willing African traders.

      Content guidance

      Depiction or discussion of discriminatory behaviour

      Depiction or discussion of sensitive content

      Depiction or discussion of violence or suffering

      Supervision

      Adult supervision recommended

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Which European nation was the first to arrive on the West African coast in the 1400s and began to trade enslaved people from the 1500s?

      Britain
      Correct answer: Portugal
      Spain
      Germany

      Q2.
      Which two of the following nations had started building large empires in the Americas in the 1500s?

      Correct answer: Spain
      Correct answer: Portugal
      France
      Germany

      Q3.
      When the Portuguese first arrived in West Africa, they intended to trade their goods for ...

      Correct Answer: Gold, gold

      Q4.
      Which two of the following are names given for the three-point trade between Europe, West Africa and the Americas, that involved the trade of enslaved people?

      Correct answer: Transatlantic Slave Trade
      Transatlantic Enslaved Trade
      Triangular Atlantic Trade
      Correct answer: Triangular Trade

      Q5.
      How did the kingdom of Benin continue to thrive, despite their leaders refusing to sell their people to the European merchants to enslave?

      they won wars against the Portuguese and Dutch
      Correct answer: they established peaceful relationships with the European merchants
      the European merchants could not reach the kingdom of Benin

      Q6.
      When enslaved people were taken from West Africa by European merchants, which continent were they taken to?

      Correct Answer: The Americas, America, North America, South America

      6 Questions

      Q1.
      By 1600, how many people had the Portuguese sold into slavery in the Americas?

      1500
      15 000
      Correct answer: 150 000
      15 000 000

      Q2.
      Which one of the following is the best defintion of an 'Oba'?

      the word used in the kingdom of Benin to describe enslaved people
      the word used in the kingdom of Benin to describe the Portuguese
      the word used in the kingdom of Mali to describe their ruler
      Correct answer: the word used in the kingdom of Benin to describe their ruler

      Q3.
      Match each word to the correct definition

      Correct Answer:Oba,the word used in the kingdom of Benin to describe the ruler
      Correct Answer:enslave,to make someone to become the legal property of someone else
      Correct Answer:prisoner of war,people captured by the opposing side during a war

      Q4.
      Which one of the following explains why the Transatlantic Slave Trade continued to expand even though the Obas of Benin refused to trade enslaved people?

      the Obas only refused for a short period of time, but then willingly agreed
      Correct answer: other kingdoms continued to sell people to the Europeans to enslave (eg. Allada)
      the Portuguese forced the Obas to change their mind after a short period of time

      Q5.
      Who took control of Elmina castle in 1637?

      Correct Answer: Dutch merchants, The Dutch, Dutch, The Dutch merchants

      Q6.
      Which two of the following best explains why kingdoms in West Africa suffered as a result of competing European merchants?

      Correct answer: they began to build relationships with European merchants
      the European merchants would always overthrow their ruler
      Correct answer: they could also face harsh peace treaties if their European allies lost a war
      all European merchants intentionally started wars between kingdoms

      To help you plan your 8 history lesson on: The expansion of the Transatlantic Slave Trade, download all teaching resources for free and adapt to suit your pupils' needs...