The allied advance in north-east France continued, despite Napoleon's tactical success at the 20–21 March Battle of Arcis-sur-Aube. Paris surrendered on the night of 30/31 March, following a brief defensive battle. The French Senate deposed the emperor on 1 April and Napoleon himself chose to abdicate on 4 April in favour of his son. On 13 April Napoleon accepted the Treaty of Fontainebleau which exiled him to Elba and Louis XVIII was installed as King of France, restoring the Bourbons to the throne. In the period between his abdication and exile to Elba Napoleon, at Fontainebleau, told Charles Joseph, comte de Flahaut that he was glad to have not agreed to the Châtillon terms stating: "I should have been a sadder man than I am if I had to sign a treaty taking from France one single village which was hers on the day I swore to maintain her integrity".