Answer:
I would say that his main achievement was his ability to unite the whole Greece under his reign and authority after battle of Chaeronea.
Explanation:
While he was a child, Philip was sent into Thebes as a part of treaty, which led him to be more and more acquainted with their culture, military tactics, governing system.
Therefore, when he started ruling in Macedonia he tried to use all of these features to strengthen his authority and later to spread it across whole Greece.
Https://15minutehistory.org/2012/12/03/episode-6-effects-of-the-atlantic-slave-trade-on-the-americas/
Over the period of the Atlantic Slave Trade, from approximately 1526 to 1867, some 12.5 million slaves were shipped from Africa, and 10.7 million arrived in the Americas.
