The Macedonians, being on a higher slope of the hill than the Romans, were at first the more successful.
In their triumph at having worsted even a detachment of the Romans, they sent messengers to tell King Philip of their success, and to urge him to bring up the main body of his army without delay.
The king hesitated. He had not expected to meet the enemy that day, and had sent off a large number of his men to forage. His army, too, was on rough and even precipitous ground, which was quite unsuitable for the movement of the phalanx, which needed a wide open space in which to move.
The Macedonian phalanx was as important a part of Philip's army as the elephants had been in that of Hannibal. It was formed by sixteen thousand men in close order, sixteen rows deep, and the men were armed with long spears. These spears were held in such a way that those of the first five ranks reached to the front row, so that a wall of solid steel seemed to stare the enemy in the face.
The eleven ranks behind held their weapons in a slanting position over the heads of those before them, and thus shielded their comrades from the darts aimed at them.
Now the men forming the phalanx marched so close together that they could turn neither to flank nor rear, but must move straight forward. Their spears, which varied from sixteen to fourteen cubits, could only be used for the one forward movement.
In the days of Pyrrhus, the Romans had dreaded the attack of the phalanx, but now they had lost all fear of this body. They were lightly armed, could move swiftly, and had grown used to annoy and defeat it.
On this misty autumn morning, then, in 197 B.C., Philip reluctantly yielded to the wishes of his soldiers, and ordered his army to move to the ground, from which the advance guard of the Romans had already been driven.
