Wallace was at the head of a third body, which acted under his command.

The Scottish army placed their pikemen along their front; lined the intervals between the three bodies with archers; and dreading the great superiority of the English in cavalry, endeavored to secure their front by palisadoes, tied together by ropes.[**] In this disposition they expected the approach of the enemy.
* Rymer, vol.ii.p.

813.
** Walsing.p.75.Heming, vol.i.p.

163.
The king, when he arrived in sight of the Scots, was pleased with the prospect of being able, by one decisive stroke, to determine the fortune of the war; and dividing his army also into three bodies, he led them to the attack.

The English archers, who began about this time to surpass those of other nations, first chased the Scottish bowmen off the field; then pouring in their arrows among the pikemen, who were cooped up within their intrenchments, threw them into disorder, and rendered the assault of the English pikemen and cavalry more easy and successful.
The whole Scottish army was broken, and chased off the field with great slaughter; which the historians, attending more to the exaggerated relations of the populace than to the probability of things, make amount to fifty or sixty thousand men.[*] It is only certain, that the Scots never suffered a greater loss in any action, nor one which seemed to threaten more inevitable ruin to their country.
* Walsing.p.76.