Serbia's position was similar to that of Greece. The Serbians asked for considerable territorial compensations along the whole western border with Bulgaria. Rebuffed by Bulgaria, but assured of support from Austria-Hungary, king Milan I declared war on Bulgaria on . However, after the decisive Battle of Slivnitsa, the Serbs suffered a quick defeat and the Bulgarians advanced into Serbian territory up to Pirot. Austria-Hungary demanded the ceasing of military actions, threatening that otherwise the Bulgarian forces would meet Austro-Hungarian troops. The ceasefire was signed on 28 November 1885. On 3 March 1886, the peace treaty was signed in Bucharest. According to its terms, no changes were made along the Bulgarian-Serbian border, preserving the Unification of Bulgaria.