Thereupon a severe and bloody struggle ensued. Nicomedes prevailed and put the Mithridateans to flight until Archelaus, advancing from the right flank, fell upon the pursuers, who were compelled to turn their attention to him. He yielded little by little in order that the forces of Neoptolemus might have a chance to rally. When he judged that they had done so sufficiently, he advanced again. At the same time the scythe-bearing chariots made a charge on the Bithynians, cutting some of them in two, and tearing others to pieces.
The army of Nicomedes was terrified at seeing men cut in halves and still breathing, or mangled in fragments and their parts hanging on the scythes. Overcome rather by the hideousness of the spectacle than by loss of the fight, fear took possession of their ranks.