The exact details of the outbreak of the war are hard to arrange chronologically. Writs were being sent about by the Queen in the King's name ordering every one to be ready to assemble "with as many men as they might, defensibly arrayed," as early as May. But no such muster seems to have taken place, and it was not till September that a blow was struck. In the middle of that month an army was raised in the Midlands with which the King took the field. A summons was then sent to Salisbury, who lay at Sherif Hoton in his northern lands, bidding him come to London. Remembering what had happened to his son on his last visit to the King, Salisbury went not, but took the summons, combined with the mustering of the King's forces, as an alarm of war. Collecting some three thousand of his Yorkshire tenants, he marched off to seek his brother-in-law York, who was lying at Ludlow. At the same time he sent messengers to his son at Calais, bidding him cross over at once to join him.
Warwick, seeing that the crisis was come, took two hundred men-at-arms and four hundred archers of the garrison of Calais, under Sir Andrew Trollope a veteran of the French War, and crossed to Sandwich. He left Calais, where lay his wife and his two daughters, in charge of his uncle, William Neville Lord Fauconbridge, "a little man in stature but a knight of great reverence." Warwick marched quietly through London, and crossed the Midlands as far as Coleshill in Warwickshire without meeting an enemy. There he just avoided a battle, for Somerset, with a great force from his Wessex lands, was marching through the town from south-west to north-east the same day that Warwick traversed it from south-east to north-west; but as it happened they neither of them caught any sight or heard any rumour of the other.
While Warwick was taking his way through the Midlands, decisive events had been occurring. When the Queen, who lay at Eccleshall in Staffordshire, heard that Salisbury was on his way to York's castle of Ludlow, she called out all her new-made friends of the north-west Midlands, and bade them intercept the Earl. Lord Audley their leader was given a commission to arrest Salisbury and send him to the Tower of London. All the knighthood of Cheshire and Shropshire came together and joined Audley, who was soon at the head of nearly ten thousand men. With this force he threw himself across Salisbury's path at Blore Heath near Market Drayton on September 23rd. The old Earl refused to listen to Audley's summons to surrender, entrenched himself on the edge of a wood and waited to be attacked. Audley first led two cavalry charges against the Yorkist line, and when these were beaten back by the arrows of the northern archers, launched a great column of billmen and dismounted knights against the enemy. After hard fighting it was repulsed, Audley himself was slain, and the Lancastrians drew back, "leaving dead on the field most of those notable knights and squires of Chesshire that had taken the badge of the Swan."