Which european country first realized that there was money to be made by capturing and selling african slaves?

Portugal

Explanation:

Portuguese explorers were the first to begin the Capturing and selling of African slaves from the west coast and this was as far back as the 15th century before other European Nations joined in the exploration of Africa and capturing African slaves form the coasts of Africa.

The captured slaves were bought from African leaders along the west coast and taken away by the slave masters to their country to work on Plantations or to be sold to another Master or Another country. the Transatlantic slave Trade was one the most famous trade routes through which most African slaves were captured and sold.

danielu suge pula

explanation:

after a more than a decade and a half of combating al qaeda (aq) in afghanistan and pakistan,

the united states faces a diverse array of threats from al qaeda affiliates in the middle east and

africa. while senior al qaeda figures reportedly remain based in pakistan, the network includes

a number of affiliates across the middle east and africa including al qaeda in the arabian

peninsula (aqap), al qaeda in the islamic maghreb (aqim), and al shabaab. al qaeda also

retains a small but possibly growing presence in afghanistan. u.s. officials have stated that al

qaeda still maintains a foothold in syria through its ties to hay’at tahrir al sham (formerly

known as the nusra front), though the exact nature of that relationship may be evolving. this

report examines the threat posed by al qaeda affiliates in the middle east and africa as described

by u.s. officials and outside observers, as well as the u.s. approach to date in responding to these

threats. this was all i could find hope this : )