On July 21, 1403, at the Battle of Shrewsbury, an Army led by the King Henry IV defeated a rebel army led by Henry "Hotspur" Percy of Northumberland thus ending the Percy challenge to the throne. An excerpt from the article:
"Battle of Shrewsbury
21st July 1403
When Henry Bolingbroke had usurped the throne of England from his cousin Richard II in 1399, becoming King Henry IV, he did it with the assistance of the powerful Percy family, including Henry Percy, 1st Earl of Northumberland . But the relationship between Northumberland and the king was far from amicable. By 1403 the Percys were demanding payment for outstanding debts from 1399 amounting to £20,000; an exorbitant figure. Added to this was their severe displeasure at the King’s insistence of keeping the Scottish nobles captured at Homildon Hill the previous year as prisoners of war rather than applying for their ransom. To Northumberland, who had led the victorious English troops, this was adding insult to injury and further depriving him of what he considered to be due reward. Henry was unlikely to have been deliberately withholding payment, he simply did not have the resources.
Northumberland’s son, the infamous Sir Henry 'Hotspur' Percy, had been given high office in Wales, where he had completed several successful campaigns against the rebellious Owain Glyndwr, in 1401 and 1402. But he too awaited payment for services. In a complete reversal of allegiance the Percys now formed an alliance with Glyndwr and Edward Mortimer. Mortimer was uncle to the Earl of March, still in his minority, as well as brother-in-law to Hotspur and son-in-law to Glyndwr. In an effort to gain support and justify their actions the Percys now claimed that they had only supported Henry in 1399 on the understanding that he only sought to reclaim his confiscated lands and that they had no idea he intended to usurp the throne. They also accused Henry of starving Richard to death in his castle at Pontefract.
The Percys now supported the Earl of March as rightful heir to the throne. With a hastily mustered force, gathered largely in Cheshire, along with George, Earl Douglas (a captive from the battle of Homildon Hill the previous year but now allied with Percy), Hotspur headed towards Shrewsbury to join forces with the other rebels. That town was garrisoned by the King’s eldest son, Harry (later to become arguably our most famous military commader, Henry V), but this small force was unlikely to withstand an attack from the combined rebel forces. So, on the advice of the Scottish Earl of March, George Dunbar, the king headed north-west to intercept Hotspur before he could join forces with Glyndwr. The race for Shrewsbury was won by the king, who reached the town shortly before Hotspur on the 20th September.
Percy was now isolated on the north side of the town, with the River Severn and the king’s army between him and reinforcements from Wales. Withdrawing from the town, Percy spent the night some 3 miles north-west of Shrewsbury at the village of Berwick. The following morning, with no sign of Glyndwr but with the king’s forces advancing out of Shrewsbury, Percy hurriedly left Berwick and headed away from the river towards Harlescott. A battle was now inevitable."