 On 21 May 1420, the Treaty of Troyes is signed.With the Burgundian faction dominant in France, King Charles VI of France acknowledges Henry V of England as his heir and as virtual ruler of most of France.Charles VII of France and Philip the Good, Duke of Burgundy, then signed the 1435 Treaty of Arras, which allowed the Burgundians to return to the side of the French just as things were going badly for their English allies.