Medieval

De Montfort deployed his smaller army into four divisions:

On Simon de Montfort's right, facing the king, was the division under de Montfort's sons Henry, Simon and Guy, together with John de Burgh and Humphrey de Bohun
The central division was under Clare, John fitz John and William de Munchensy
De Montfort's third division, on the left, containing the Londoners under Nicholas de Seagrave and Henry of Hastings, faced Edward
De Montfort's fourth division, containing Simon himself, and Thomas of Pulesdon, constable of London, was held in reserve behind the three forward divisions

All divisions probably organised themselves with a front rank of cavalry and trailing ranks of infantry, strengthened by the inclusion of unmounted highly trained serjeants and knights. In the case of the Londoners in de Montfort's third division, these infantry were particularly poor.

The ground where the two sides met is saddle-shaped: that is, each flank could not see across the field to their other flank, so the king was limited in his view of the action. De Montfort, on higher ground and probably in the middle of his fourth division, would have commanded a much wider and more useful view.