This nation lost a significant part of its south after an embarrassing defeat at the battle of Maritsa, and this nation suffered another loss to Louis the Great, leading to the creation of the Dusan Code.
This nation lost a significant part of its south after an embarrassing defeat at the battle of Maritsa, and this nation suffered another loss to Louis the Great, leading to the creation of the Dusan Code. The retreat of forces under Vuk Brankovic at the Field of the Blackbirds led to the conquest of this nation, home to the Chetnik resistance during World War II. A member of the Black Hand organization based here, Gavrilo Princip, shot Sophia and the Archduke Franz Ferdinand, leading to the start of World War I.  For 10 points, identify this nation that was the base of operations for the Partisans of Josip Tito with a capital at Sarajevo.
This nation lost a significant part of its south after an embarrassing defeat at the battle of Maritsa, and this nation suffered another loss to Louis the Great, leading to the creation of the Dusan Code.
{Serbia}