Quote Originally Posted by bovi
http://en.wikipedia.org/wiki/Alexander_the_Great
Alexander the Great (Greek: Μέγας Aλέξανδρος,[1][2] Megas Alexandros; July 20, 356 BC – June 10, 323 BC), also known as Alexander III, was an Ancient Greek king of Macedon (336–323 BC).
Not entirely unhistorical.
You beat me to it, bovi.

As a matter of fact, I would prefer 8 tpy, or even 12. Really, it's entirely unrealistic for a fleet to need half a year to sail from Italy to Africa, or for a family member to come of age in Iberia, immediately leave for Rome only to arrive when he's 25 or so.