The town expanded significantly after Napoleon I chose the site as the new préfecture of the Vendée on 25 May 1804, replacing Fontenay-le-Comte (then under its revolutionary name of Fontenay-le-Peuple). At the time, most of La Roche had been eradicated in the Vendée Revolt (1793–96); the renamed Napoléonville was laid out and a fresh population of soldiers and civil servants was brought in. Napoléonville was designed to accommodate 15,000 people.