The Battle of Grahovac took place in the eponymous village of Grahovac from 11 to 13 May 1858, when the Montenegrin Grand Duke Mirko Petrović-Njegoš led the army of Principality of Montenegro against the Ottomans, ending in a decisive Montenegrin victory. After the victory, the demarcation of the border between Montenegro and the Ottoman Bosnia Eyalet was finalised. A considerable arsenal of war trophies was captured following the retreat of the Ottoman army.

The Principality of Montenegro was a principality in Southeastern Europe that existed from 13 March 1852 to 28 August 1910. It was then proclaimed a kingdom by Nikola I, who then became King of Montenegro.