 In the absence of an official heir to the throne , Isabeau accompanied King Charles to sign the Treaty of Troyes in May 1420 ; Gibbons writes that the treaty " only confirmed [ the Dauphin 's ] outlaw status " . The King 's malady prevented him from appearing at the signing of the treaty , forcing Isabeau to stand in for him , which according to Gibbons gave her " perpetual responsibility in having sworn away France " . For many centuries Isabeau stood accused of relinquishing the crown because of the Treaty . Under the terms of the Treaty , Charles remained as King of France but Henry V , who married Charles ' and Isabeau 's daughter , Catherine , kept control of the territories he conquered in Normandy , would govern France with the Duke of Burgundy , and was to be Charles ' successor . Isabeau was to live in English @-@ controlled Paris . 
