Exactly - Hungarian independence was ended after Louis II had the misfortune to die at Mohacs and the have the Habsburgs and Ottomans partition it. Now since in this TL Louis doesn't die there...
Revival of the Auld Alliance
King Arthur of England, feeling that with French success in Italy, felt that undermining French power was important. This was reinforced by his strong associations with the Spanish Iberian kingdom - his wife was the youngest daughter of the Catholic Monarchs, and his eldest daughter Mary was married to King Miguel, who by 1517 ruled Castile and Aragon and was the heir to Portugal. Though he declined to participate in the War of the League of Cambrai[1], he eventually declared war on France, following the United Kingdom in late 1521.
Preparing an army, he set out and arrived in Calais in 1522. With French forces distracted in Italy, he hoped to weaken France enough that its expansion would be limited. Regaining the old Angevin lands was certainly out of the question; the decisive loss in the Hundred Years' War of all continental possessions save the Pale of Calais meant that the Tudors prudently looked within Britain. However, James IV of Scotland[2] remembered the Auld Alliance. This defensive pact between France and Scotland stipulated that if either state came under attack by England, then the other would come to its aid. It served well, especially in the Hundred Years' War.
James IV began to mass his soldiers, and by mid-1522, he attacked Northumberland, easily overwhelming the garrisons. By then he had managed to stabilize Scotland, and now, he not only intended to help France, but weaken England by taking regions close to the Scottish border. However, Arthur was not distracted by the news of the invasion, hoping that the second army he initially intended to assist his main army in France could face the Scottish. This army was led by the 3rd Duke of Norfolk, Thomas Howard.
Norfolk began to move north to interrupt James, and they met at Flodden Field. What Norfolk expected to be a clear victory of the bill over the pike, was sadly mistaken. James IV had become more seasoned in battle, eventually making his more impetuous soldiers more disciplined, but still showing the great bravery the Scots were known for. James prudently put himself at the rear, letting the vanguard do their worst. As English and Scottish met, the battle was a bloody show of arms, with the famed longbow not making a difference as major than in France - after all, it was best used against encumbered knights.
In the end, Norfolk was killed[3] and James now had Northumberland firmly in his grasp. When Arthur received the news, he himself returned to England, leaving the army under the command of Charles Percy[4], a seasoned soldier, though not of noble birth.
[1]Arthur isn't as impetuous as Henry VIII is with regards to France.
[2]Since Arthur doesn't participate in the War of the League of Cambrai, James doesn't go and die at Flodden Field.
[3]An exact reversal of OTL.
[4]Entirely made-up.