Arsites was satrap of Hellespontine Phrygia under Darius III. He was primus inter pares of the Persian commanders at the Battle of Granicus. Alexander replaced Arsites with his general Calas as the new satrap of the province.
References[]
Cartledge, P., Alexander the Great (Vintage Books, 2004), p. 300.
The original article can be found at Arsites and the edit history here.