On 22 January 1815, Portugal and Britain signed a treaty prohibiting Portuguese subjects from trading enslaved people along the African coast north of the Equator. The measure constrained a portion of the trade while leaving Portuguese trafficking south of the Equator legal for the time being. It was a diplomatic restriction on the supply system, not emancipation in Brazil; the treaty’s geographic limits and enforcement arrangements reflected negotiations between imperial powers rather than the consent of Africans subjected to the trade.
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What was a key limit of the 1815 treaty?
The treaty geographically restricted the trade, leaving Portuguese trade south of the Equator permitted.
The 1815 treaty prohibited every Portuguese slave voyage everywhere in Africa.
It banned the trade north of the Equator but left trade south of it permitted.