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.
"initiate revenue bills, impeach federal officials, and elect the President in the case of an electoral college tie" - I quote from Hal Rogers
Hope this helps, if not, comment below please!!!!
If I remember correctly yes
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