Of course the armies met haphazard, as such forces must do with little or no strategic plan; so that when the king’s levies met at Daventry, it was surprised, when contemplating the relief of Pontefract and Scarborough, to find itself in touch with the army of Fairfax, which, abandoning the siege of Oxford, had moved north to engage the royal army. With it was Cromwell as lieutenant-general of horse. But if the king was ignorant as to the whereabouts of his adversary, Fairfax was not. The use of cavalry was being understood; “every step of the army of the Parliament was guided and guarded by the action of detachments” of this arm.[11] Ireton watched and threatened the enemy’s retreat on Market Harborough, and on the evening of the 13th drove the king’s rearguard out of Naseby, the main body of the army being then south of Harborough. The next day the very casual and careless reconnaissance of Rupert’s troopers reported that no hostile bodies were in sight, and with the false impression that Fairfax was retreating, the royal army advanced to the attack of an enemy superior in number, more highly disciplined, and strongly posted on Mill Hill, north-west of the village of Naseby. The king’s army was in three lines: the first of four regiments, the second of three regiments, the third of the king’s and Rupert’s regiments. Lord Astley commanded the infantry (about 5500 men), Rupert the right, and Langdale the left, wing of cavalry, or “horse,” each about 2500 strong. The army of the Parliament was thus disposed: right wing, six regiments of cavalry under Cromwell in three lines, with the right flank echeloned back. Ireton commanded the cavalry of the left wing, of five regiments of cavalry and one of dragoons arranged in two lines, while the latter lined a hedgerow to protect the left flank. The infantry under Skippon was in two lines: the first, five regiments strong, the second or reserve, three regiments. The baggage, with a strong guard of “shot,” was posted in rear of the left flank. The battle began by the attack of Ireton against the opposing cavalry “in echelon right in front”; but as this exposed his right flank to the fire of the infantry squares of the first line, he turned his right squadrons upon them. In this he was dismounted and wounded. Whether from this cause, or what not, Rupert routed this wing, pursuing them as far as Naseby, and then wasting time in attacking the baggage train, while Ireton’s broken squadrons rallied. This is a perfect example of the reckless and unskilful way in which the Royalist charges were always made.