When the Franco-Prussian War began in 1870, France was under the control of Emperor Louis Napoleon III. A National Assembly was based in Paris, but its powers were limited. Widespread discontent amongst Assembly members before the war, particularly amongst socialist members, had given Louis-Napoleon many enemies. At the disastrous battle of Sedan, Louis-Napoleon was captured by the Prussian Army, leaving France effectively without a government. When news of Louis-Napoleon's capture reached Paris, leading members of the National Assembly rushed to the Hôtel de Ville to declare a new government. At the Hôtel de Ville, Léon Gambetta publicly declared the founding of the Government of National Defence on September 4, and the government immediately assumed control of all affairs in France, inte