One of Prusias's grievances against the Byzantines was that after having voted certain statues of him they had never erected them, but had neglected and finally forgotten the matter.
He was likewise displeased with them for having employed every effort to reconcile Achaeus with Attalus and put an end to the war between them, thinking that a friendship between these two princes was in many ways prejudicial to his own interests.
He was also irritated because it was said that the Byzantines had sent to Attalus representatives to take part in the sacrifice held at the festival of Athene, whereas they had sent none to himself when he celebrated the Soteria.
Therefore as he continued to nurse resentment for all these offences, he gladly availed himself of the pretext offered by the Rhodians and came to an agreement with their envoys demanding that they should undertake to carry on the war by sea, while he himself hoped to be able to damage the enemy no less severely on land.
Such were the causes and such was the beginning of the war between <a class="linkToPlace" target="_blank" href="/place?placename=Rhodes&groupId=931&placeId=1665">Rhodes</a> and <a class="linkToPlace" target="_blank" href="/place?placename=Byzantium&groupId=415&placeId=767">Byzantium</a>.
Walbank Commentary