Who is Pharnabazus from the book, A History of My Times?

Pharnabazus is one of the military leaders who was very active in the region. He was able to lead naval fleets rather than only infantry or cavalry. He was regularly in the field. He was not the top leadership, as there are numerous references to his falling under another's authority. At the same time it is quite clear that he has a number of people under him. There have been occasions when those under him are supportive even when people over him are not. The reverse may well also be the truth on some occasions. Throughout these changing conditions he is referred to many times early on in the book.