Serbo-Bulgarian War: Bulgarian victory in the Battle of Slivnitsa solidifies the unification between the Principality of Bulgaria and Eastern Rumelia.

The Serbo-Bulgarian War or the Serbian–Bulgarian War, a war between the Kingdom of Serbia and the Principality of Bulgaria, erupted on 14 November [O.S. 2 November] 1885 and lasted until 28 November [O.S. 16 November] 1885. Despite Bulgaria's status as a vassal of the Ottoman Empire, the Ottomans…