Fall of the Serbian Empire in the context of "Feudal fragmentation"

Kosovo, officially the Republic of Kosovo, is a landlocked country in Southeast Europe with partial diplomatic recognition. It is bordered by Albania to the southwest, Montenegro to the west, Serbia to the north and east, and North Macedonia to the southeast. It covers an area of 10,887 km (4,203 sq mi) and has a population of nearly 1.6 million, of whom the vast majority (approximately 92 per cent) are ethnic Albanians. Kosovo has a varied terrain, with high plains along with rolling hills and mountains, some of which have an altitude over 2,500 m (8,200 ft). Its climate is mainly continental with some Mediterranean and Alpine influences. Kosovo's capital and most populous city is Pristina; other major cities and urban areas include Prizren, Ferizaj, Gjilan, and Peja.

Kosovo formed the core territory of the Dardani, an Illyrian people, attested in classical sources from the 4th century BCE. The Dardani established the Kingdom of Dardania, with its political and cultural center likely located near present-day Lipjan (ancient Ulpiana). The kingdom was incorporated into the Roman Empire in the 1st century BCE; later, in the 3rd century CE, it was transformed into a separate Roman province. During the Byzantine period, the region was eventually organised as part of the Theme of Dardania and remained under imperial control, facing Slavic migrations in the 6th and 7th centuries CE. Control shifted between the Byzantines and the First Bulgarian Empire. In the 13th century, Kosovo became integral to the Serbian medieval state and the establishment of the Serbian Patriarchate. Ottoman expansion in the Balkans in the late 14th and 15th centuries led to the decline and fall of the Serbian Empire; the Battle of Kosovo of 1389, in which a Serbian-led coalition of various ethnicities fought against the Ottoman Empire, is considered one of the defining moments.

Travunia (Serbo-Croatian: Travunija / Травунија; Greek: Τερβουνία, romanized: Tervounía; Ancient Greek: Τερβουνία, romanized: Terbounía; Latin: Tribunia) was a South Slavic medieval principality that was part of Medieval Serbia (850–1371), and later the Medieval Bosnia (1373–1482). The principality became hereditary in a number of noble houses, often kin to the ruling dynasty. The region came under Ottoman rule in 1482. Its seat was in the city of Trebinje.

In the 9th and 10th centuries, the Župa of Travunia was held by the Belojević noble family, who were entitled the rule during the reign of Prince Vlastimir (r. 830–850), of the Vlastimirović dynasty. After the death of Časlav, the last dynastic member, the principality disintegrated, and the provinces were annexed by the Bulgars and Byzantines. In 1034, Stefan Vojislav (the founder of the Vojislavljević dynasty) incited a rebellion and renounced Byzantine rule, becoming the Prince of Serbs, ruling from the seat at Duklja. In the early 12th century, Desa of the Vukanović dynasty wrestled the region, and it continued under the rule of the Nemanjić dynasty (1166–1371), either held by dynastic members or close associates (most often military commanders), of which was the notable Vojinović noble family. After Nikola Altomanović, the holder of a large province during the fall of the Serbian Empire, was defeated in 1373, his estates were divided between Prince Lazar Hrebeljanović of Serbia, Đurađ I Balšić of Zeta, and Ban Tvrtko I Kotromanić of Bosnia. Trebinje continued under the Bosnian crown in the hands of the Pavlović family, and from 1435 under the Kosača family. It was finally annexed in 1481 by the Ottomans and organized into the Sanjak of Herzegovina.

Zeta (Serbian Cyrillic: Зета; Albanian: Zetës; Latin: Zenta or Genta) was one of the medieval polities that existed between 1371 and 1421, whose territory encompassed parts of present-day southern Montenegro and northern Albania, ruled by the House of Balšić.

Zeta was a crown land of the Grand Principality and Kingdom of Serbia, ruled by heirs to the Serbian throne from the Nemanjić dynasty. In the mid-14th century, Zeta was divided into Upper and Lower Zeta, governed by magnates. After Stefan Dušan (r. 1331–55), his son Stefan Uroš V ruled Serbia during the fall of the Serbian Empire, through a gradual disintegration of the Empire as a result of decentralization in which provincial lords gained semi-autonomy and eventually independence. The Balšići wrestled the Zeta region in 1356–1362 when they removed the two rulers in Upper and Lower Zeta. Ruling as lords, they empowered themselves and over the decades became an important player in Balkan politics. Zeta was united into the Serbian Despotate in 1421, after Balša III abdicated and passed the rule to his uncle, Despot Stefan Lazarević (maternally a Nemanjić).

Andrea II Muzaka (c. 1318–1372), or Andrew II, was an Albanian nobleman of the Muzaka family and the ruler of the Principality of Muzaka in the 14th century. He inherited the principality from his father, Teodor I Muzaka, who died around 1331. Andrea II is known for having expanded the Principality of Muzaka to its greatest extent, from the southern Adriatic coastline of Albania in the west to Kastoria in the east by the time of his death in 1372.

He was recognised as Despot of the Kingdom of Albania and as Marshal of Albania by the Angevin Kingdom of Albania in 1336-37. In the next decade, he led the resistance against the Serbian invasions of Albania, and after the fall of the Serbian Empire, he regained his former territories and began to expand again. During his wars against the Serbian successor states, Andrea II succeeded in defeating both Vukašin of Serbia and his son, Prince Marko, solidifying his family's principality. He was recognized as Despot of Epirus by the Byzantine Emperor John V Palaiologos for his victories against the Serbians.

The House of Balšić (Serbian Cyrillic: Балшићи; Albanian: Balsha, Balshaj), or Balsha, were a noble family that ruled "Zeta and the coastlands" (current-day southern Montenegro and northern Albania), from 1362 to 1421, during and after the fall of the Serbian Empire. Balša, the founder, was a petty nobleman who held only one village during the rule of Emperor Dušan the Mighty (r. 1331–1355), and only after the death of the emperor, his three sons gained power in Lower Zeta after acquiring the lands of gospodin Žarko (fl. 1336–1360) under unclear circumstances, and they then expanded into Upper Zeta by murdering voivode and čelnik Đuraš Ilijić (r. 1326–1362†). Nevertheless, they were acknowledged as oblastni gospodari of Zeta in edicts of Emperor Uroš the Weak (r. 1355–1371). After the death of Uroš (1371), the family feuded with the Mrnjavčevići, who controlled Macedonia.

When the last lord of the main branch of the family, Balša III died in 1421 without an heir, his possessions were passed on to his uncle, Despot Stefan the Tall. Later that year, the Republic of Venice took advantage of Balša's death and seized the towns of Bar and Ulcinj, and some of his other territories were seized by the Ottomans and Bosnians.

The Vojinović family (Serbian Cyrillic: Војиновић, pl. Vojinovići / Војиновићи) is a medieval Serbian noble family that played an important role in the Serbian Empire during the 14th century. Following the death of Emperor Dušan (King 1331–1346, emperor 1346–1355), in the period of the Fall of the Serbian Empire, its representatives, Grand Duke Vojislav Vojinović (c. 1355–1363) and later his cousin Nikola Altomanović Vojinović (1366–1373), were among the strongest regional lords in medieval Serbia.

The House of Mrnjavčević (Serbian Cyrillic: Мрњавчевић, pl. Mrnjavčevići / Мрњавчевићи, pronounced [mr̩̂ɲaːʋt͡ʃeʋit͡ɕ]) was a medieval Serbian noble house during the Serbian Empire, its fall, and the subsequent years when it held a region of present-day Macedonia region. The house ruled a province from its base at Prilep (in modern North Macedonia) from 1366 to 1395.

Vukašin Mrnjavčević was a military commander in the army of Emperor Dušan the Mighty (r. 1331-1355) and co-ruler of Serbia as king, with Emperor Uroš the Weak (r. 1355-1371). After Uroš' death, the Serbian Empire crumbled, as the nobility could not agree on its rightful successor. Vukašin's son, Marko Kraljević, ruled his hereditary lands as titular King of Serbs and Greeks.