David withdrew, but the Franks, incautiously advancing into the hilly country, were suddenly surprised by Andronikos Gidos, a general of Laskaris, in the Rough Passes of Nicomedia, and scarcely a man of them was left.
David's withdrawal led to the Franks' ill-fated advance into the mountainous terrain, where they were unexpectedly confronted by Andronikos Gidos, a skilled military leader under Laskaris, at the Rough Passes of Nicomedia, resulting in a crushing defeat for them.