After 1435, Philip the Good was no longer interested in the French affairs, and ruled his territories as their own sovereign.

Philip managed to considerably expand the Burgundian State in the Low Countries.
In 1421, he bought the County of Namur from the impoverished Marquis of Namur, inheriting it outright in 1429.
In 1430, he inherited the Margraviate of Antwerp and the Duchies of Brabant, Limburg and Luxembourg, succeeding his cousin Philip, son of Anthony of Burgundy.
He also took advantage of a succession crisis to make himself the heir of Jacqueline of Hainaut — at the time of her death, in 1433, he seized her Counties of Hainaut, Holland and Zeeland.
Finally, in 1441 he bought from his aunt Elizabeth of Görlitz the Duchy of Luxembourg.
The Low Countries were at last united, becoming the Burgundian Netherlands.

Under his rule, the court of Burgundy found its apex.
A great patron, he made it a major artistic center.
Burgundian celebrations and banquets enjoyed international reputation.
Philip himself was a renowned prince within the Christendom, especially by repeated calls for Crusade, like during the Feast of the Pheasant.
In 1430, he created the prestigious Order of the Golden Fleece.

However, the growing centralisation of power under the House of Burgundy did not please the Flemish cities, proud of their autonomy and liberties.
Duke Philip had to suppress the Bruges Rebellion of 1436–1438, and then the Revolt of Ghent of 1449–1453.
Both times, Burgundian forces had been able to count on the support of the other Flemish towns.
After those two events, urban liberties were severely damaged.
Burgundian domination only increased.

Another great opposition were the Wars of Liège, a series of three rebellions led by the Principality of Liège, refusing the Burgundian protectorate and Louis de Bourbon, nephew of Philip the Good, as their Prince-Bishop.
Three times the rebels were defeated, until Charles the Bold sacked and destroyed the town in 1468.

At the end of Philip's long reign, under the influence of the House of Croÿ, the Duke got closer to King Louis XI of France, which he hosted when he was opposed to his father.
Louis bought back the towns of Picardy, which displeased Charles, count of Charolais, the Duke's son and heir.
He joined a noble revolt against the King, the League of the Public Weal, whereupon the King returned the towns to Burgundy.
After 1435, Philip the Good was no longer interested in the French affairs, and ruled his territories as their own sovereign.
Philip managed to considerably expand the Burgundian State in the Low Countries. In 1421, he bought the County of Namur from the impoverished Marquis of Namur, inheriting it outright in 1429. In 1430, he inherited the Margraviate of Antwerp and the Duchies of Brabant, Limburg and Luxembourg, succeeding his cousin Philip, son of Anthony of Burgundy. He also took advantage of a succession crisis to make himself the heir of Jacqueline of Hainaut — at the time of her death, in 1433, he seized her Counties of Hainaut, Holland and Zeeland. Finally, in 1441 he bought from his aunt Elizabeth of Görlitz the Duchy of Luxembourg. The Low Countries were at last united, becoming the Burgundian Netherlands.
Under his rule, the court of Burgundy found its apex. A great patron, he made it a major artistic center. Burgundian celebrations and banquets enjoyed international reputation. Philip himself was a renowned prince within the Christendom, especially by repeated calls for Crusade, like during the Feast of the Pheasant. In 1430, he created the prestigious Order of the Golden Fleece.
However, the growing centralisation of power under the House of Burgundy did not please the Flemish cities, proud of their autonomy and liberties. Duke Philip had to suppress the Bruges Rebellion of 1436–1438, and then the Revolt of Ghent of 1449–1453. Both times, Burgundian forces had been able to count on the support of the other Flemish towns. After those two events, urban liberties were severely damaged. Burgundian domination only increased.
Another great opposition were the Wars of Liège, a series of three rebellions led by the Principality of Liège, refusing the Burgundian protectorate and Louis de Bourbon, nephew of Philip the Good, as their Prince-Bishop. Three times the rebels were defeated, until Charles the Bold sacked and destroyed the town in 1468.
At the end of Philip's long reign, under the influence of the House of Croÿ, the Duke got closer to King Louis XI of France, which he hosted when he was opposed to his father. Louis bought back the towns of Picardy, which displeased Charles, count of Charolais, the Duke's son and heir. He joined a noble revolt against the King, the League of the Public Weal, whereupon the King returned the towns to Burgundy.
Burgundian State