The Ligue internationale de la paix was created after a public opinion campaign against a war between the Second French Empire and the Kingdom of Prussia over Luxembourg. The Luxembourg crisis was peacefully resolved in 1867 by the Treaty of London but in 1870 the Franco-Prussian War could not be prevented so the league dissolved and refounded as the 'Société française pour l'arbitrage entre nations' (League of arbitration between the Nations) in the same year.