In October, 1642, Charles I and his Royalist forces began marching on London. The Parliamentary army attempted to block their way and engaged the Royalists at Edgehill on 23rd October. It is estimated that both sides had around 14,000 men.
Prince Rupert and his Cavaliers made the first attack and easily defeated Robert Devereux, the commander of the left-wing of the Parliamentary forces. Henry Wilmot also had success on the right-wing and this left the foot soldiers of both sides to fight it out in the centre. The Parliamentarians held their line and their calvary managed to attack the Royalist flank.
Prince Rupert's cavalrymen lacked discipline and continued to follow those who ran from the battlefield. John Byron and his regiment also joined the chase. The royalist calvary did not return to the battlefield until over an hour after the initial charge. By this time the horses were so tired they were unable to mount another attack against the Roundheads. The fighting ended at nightfall.
Robert Devereux decided to withdraw his men to Warwick. This left the Royalists free to march on London. However, Charles I decided to make his way to Oxford, which became his headquarters for the duration of the war.
Arms were the great deficiency, and the men stood up in the same garments in which they left their native fields; and with scythes, pitchforks, and even sickles in their hands, they cheerfully took the field, and literally like reapers descended to the harvest of death.
Our men are very raw, our victuals scarce and provisions for horses worse. I daresay there was never so raw, so unskilful and so unwilling an army brought to fight.
The field was covered with the dead, yet no one could tell to what party they belonged... Some on both sides did extremely well, and others did ill and deserved to be hanged.
At Edgehill... the foot soldiers stood their ground with great courage; and though many of the King's soldiers were unarmed and had only cudgels, they kept their ranks, and took up the arms which their slaughtered neighbours left to them.