The ministers of Egypt sought the protection of Rome.

On their journey, the Roman envoys sent to assume the office of protectorship remonstrated with Philip.
In Asia Minor Philip had conducted himself with such barbarity that the people rose against him; and from a similar cause Greece was driven to seek alliances which would protect her against him.
Rome was unwilling to undertake a new war, but the people were induced to vote for one, on the representation that the only means of preventing an invasion of Italy was to carry the war abroad.
This year (200) the Consul, Publius Sulpicius Galba, was sent with a considerable force across the Adriatic.

His campaign, and that of the Consul Villius during the next year, were productive of no decisive results, but in 198 the Consul TITUS QUINCTIUS FLAMININUS, a man of different calibre, conducted the war with vigor.

He defeated Philip on the Aous, drove him back to the pass of Tempe, and the next year utterly defeated him at CYNOSCEPHALAE.
The king had drawn up his forces in two divisions.

With the first he broke through the line of the legions, which, however, closed in around him with but little loss.