Ere the peace was well concluded, news was brought to the king that the Romans had arrived at Dyrrachium; that the Parthinians, and other bordering nations, were up in arms on seeing hopes of effecting a change; and that Dimallum was besieged.

The Romans had turned their efforts to that quarter instead of assisting the Aetolians, for which purpose they had been sent, from resentment at the conduct of the Aetolians for making peace with the king without their sanction, contrary to the league.

When Philip had received intelligence of these events, lest any greater commotion should arise in the neighbouring nations and states, he proceeded by forced marches to Apollonia, to which place Sempronius had retired, having sent Laetorius, his lieutenant-general, with a part of his forces and fifteen ships into Aetolia, to look into the state of affairs, and, if he could, dissolve the peace.

Philip laid waste the lands of the Apollonians, and, advancing his troops to the tower, offered the Romans battle.

But seeing that they remained quiet, only defending the walls, and not having sufficient confidence in his strength to assault the town, being desirous also of making peace with the Romans if possible, as he had with the Aetolians, or at least a truce, he withdrew into his own dominions, without further exciting their animosity by a fresh contest.