Dio implies that he did so out of cowardice, in order to avoid the imminent clash with the opposition, but it is more likely that he was pursuing an enemy cavalry force, which was possibly acting as a decoy.
He did so out of cowardice. This was to avoid the imminent clash with the opposition. Dio implies this. He was pursuing an enemy cavalry force. This is more likely. An enemy cavalry force was possibly acting as a decoy.