Kolubara was the site of one of the major battles on the Balkans in World War I, the Battle of Kolubara was the site of one of the major battles on the Balkans in World War I, the Battle of Kolubara was the site of one of the major battles on the Balkans in World War I, the Battle of Kolubara was the site of one of the major battles on the Balkans in World War I, the Battle of Kolubara was the site of one of the major battles on the Balkans in World War I
Battle of Kolubara in 1914.