Kingdom of Montenegro, 1912
The Principality of Montenegro had become a Kingdom in 1910 under Nicholas I and, after it had arranged “incidents” on its southern border in August and September 1912 and in October joined Serbia, Greece and Bulgaria in the First Balkan War against the Ottoman Empire. It occupied the western Kosovo region of Metohija, from Peja to Prizren, with great brutality, resulting in thousands of deaths among the Albanian population. Northern Metohija was recognised as part of Montenegro at the Treaty of London in May 1913.