His energy was soon seen in a more active interposition in the affairs of France.

So bitter had the hatred grown between the Burgundian and Armagnac parties that both in turn appealed again to England for help.
The Burgundian alliance found favour with the Council.

In August, 1411, the Duke of Burgundy offered his daughter in marriage to the Prince as the price of English aid, and four thousand men with Lord Cobham among their leaders were sent to join his forces at Paris.

Their help enabled Duke John to bring his opponents to battle at St.Cloud, and to win a decisive victory in November.

But already the king was showing himself impatient of the Council's control; and the Parliament significantly prayed that "as there had been a great murmur among your people that you have had in your heart a heavy load against some of your lieges come to this present Parliament," they might be formally declared to be "faithful lieges and servants." The prayer was granted, but in spite of the support which the Houses gave to the Prince, Henry the Fourth was resolute to assert his power.