after the Second French Empire royalists became a majority in the National Assembly the Legitimists and Orléanists both thought Henri, comte de Chambord should be made king, however Henri wouldn't take the Crown unless France gave up the tricolour and started using the fleur-de-lis, the National Assembly wouldn't do it and formed the Third Republic to wait for Henri to die.
so what if Henri liked the tricolour, and takes the Crown in 1872? what does the rain of Henri V look like? does the French Monarchy survive through to today? does Henri V mess it all up?