In late 1916 and early 1917, secret peace talks took place between Austria-Hungary and France. There is circumstantial evidence that parallel discussions were held between Austria-Hungary and Serbia with Prime Minister Pašić dispatching his righthand man Stojan Protić and Regent Alexander dispatching his confidant Colonel Petar Živković to Geneva on secret business. Charles I of Austria laid out Austria-Hungary's key demand for returning Serbia to the control of the Serbian Government in exile: that Serbia should provide guarantees that there be no further political agitation emanating from Serbia against Austria-Hungary.