Answer:
Although Leopold II established Belgium as a colonial power in Africa, he is best known for the widespread atrocities that were carried out under his rule, as a result of which as many as 10 million people died in the Congo Free State.
Deportation is usually what is used at this point in time.
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Expansion of Slavery impacted the lives of already enslaved people, by causing them to continue being abused and held as slaves. The expansion further strengthened the practice of slavery, making it even harder for slaves to escape and causing more people to be enslaved too.