Roi de France (1380-1422) insanity led to rule of Henry V of England, end of 100 Years War.after his father's death in 1380, he was under the guardianship of a ducal council until 1388, when he rejected its regency and began to reign in his own right. Charles ruled well until 1392, when he became insane. In the ensuing contest for control of the kingdom, France suffered grievously from civil wars between the Armagnacs (house of Orléans) and the Burgundians. The English took advantage of the internal strife to invade France. They won the Battle of Agincourt in 1415, conquered Normandy in 1417, captured Rouen in 1419 and Paris in 1420, and imposed on Charles the Treaty of Troyes (1420). Under this treaty Charles was compelled to marry his daughter to Henry V and to confer on Henry or his heir the right of succession to the French throne.