North Macedonia in the context of "Socialist Republic of Macedonia"

Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to the east. The Aegean Sea lies to the east of the mainland, the Ionian Sea to the west, and the Sea of Crete and the Mediterranean Sea to the south. Greece has the longest coastline on the Mediterranean basin, spanning thousands of islands and nine traditional geographic regions. It has a population of over 10 million. Athens is the nation's capital and largest city, followed by Thessaloniki, Patras and Heraclion.

Greece is considered the cradle of Western civilisation and the birthplace of democracy, Western philosophy, Western literature, historiography, political science, major scientific and mathematical principles, theatre, and the Olympic Games. The Ancient Greeks were organised into independent city-states, or poleis (singular polis), that spanned the Mediterranean and Black seas. Philip II of Macedon united most of present-day Greece in the fourth century BC, with his son Alexander the Great conquering much of the known ancient world from the Near East to northwestern India. The subsequent Hellenistic period saw the height of Greek culture and influence in antiquity. Greece was annexed by Rome in the second century BC and became an integral part of the Roman Empire and its continuation, the Byzantine Empire, where Greek culture and language were dominant. The Greek Orthodox Church, which emerged in the first century AD, helped shape modern Greek identity and transmitted Greek traditions to the wider Orthodox world.

Southeast Europe or Southeastern Europe is a geographical sub-region of Europe, consisting primarily of the region of the Balkans, as well as adjacent regions and archipelagos. There are overlapping and conflicting definitions of the region, due to political, economic, historical, cultural, and geographical considerations.

Sovereign states and territories that may be included in the region are Albania, Bosnia and Herzegovina, Bulgaria, Croatia (alternatively placed in Central Europe), Greece (alternatively placed in the broader region of Southern Europe), Kosovo, Montenegro, North Macedonia, Romania (alternatively placed in Eastern Europe), Serbia, and the European part of Turkey (alternatively placed in the broader region of Southern Europe, also in Western Asia with the rest of the country). Sometimes, Cyprus (most often placed in West Asia), Hungary (most often placed in Central Europe), Moldova (most often placed in Eastern Europe), and Slovenia (most often placed in Central Europe) are also included due to cultural or historical factors and affiliation.

Albania, officially the Republic of Albania, is a country in Southeast Europe. It is located in the Balkans, on the Adriatic and Ionian Seas within the Mediterranean Sea, and shares land borders with Montenegro to the northwest, Kosovo to the northeast, North Macedonia to the east and Greece to the south. With an area of 28,748 km (11,100 sq mi), it has a varied range of climatic, geological, hydrological and morphological conditions. Albania's landscapes range from rugged snow-capped mountains in the Albanian Alps and the Korab, Skanderbeg, Pindus and Ceraunian Mountains, to fertile lowland plains extending from the Adriatic and Ionian seacoasts. Tirana is the capital and largest city in the country, followed by Durrës, Vlorë, and Shkodër.

Albania was inhabited by several Illyrian tribes, among them the Ardiaei, Bylliones, Dassaretii, Enchele, and Taulantians, with the Chaonians settled in the southwest. Several colonies were founded by the Ancient Greeks along the Albanian coast, most notably Apollonia. The Illyrians were the dominant power in Albania before the rise of Macedon. Following the Illyrian Wars, Albania was integrated into the Roman Empire and remained in the Byzantine Empire after its partition. During the Middle Ages, several Albanian principalities emerged, most notably the Principality of Arbanon, Kingdom of Albania, Principality of Albania and Albania Veneta. In the 15th century, Albania became a center of resistance against Ottoman expansion under the leadership of Gjergj Kastrioti Skanderbeg, whose military campaigns repelled Ottoman advances for over two decades. Although incorporated into the Ottoman Empire, Albania retained distinct cultural and social identities throughout four centuries of foreign rule, culminating in the Albanian Renaissance in the 19th century. Albania declared independence in 1912, followed by a turbulent 20th century marked by monarchy, foreign occupation during both World Wars, and a repressive communist regime under Enver Hoxha.

Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey to the south, Serbia and North Macedonia to the west, and Romania to the north. It covers a territory of 110,994 square kilometres (42,855 sq mi) and is the tenth largest within the European Union and the sixteenth-largest country in Europe by area. Sofia is the nation's capital and largest city; other major cities include Burgas, Plovdiv, and Varna.

One of the earliest societies in the lands of modern-day Bulgaria was the Karanovo culture (6,500 BC). In the 6th to 3rd century BC, the region was a battleground for ancient Thracians, Persians, Celts, and Macedonians; stability came when the Roman Empire conquered the region in AD 45. After the Roman state splintered, tribal invasions in the region resumed. Around the 6th century, these territories were settled by the early Slavs. The Bulgars, led by Asparuh, attacked from the lands of Old Great Bulgaria and permanently invaded the Balkans in the late 7th century. They established the First Bulgarian Empire, victoriously recognised by treaty in 681 AD by the Byzantine Empire. It dominated most of the Balkans and significantly influenced Slavic cultures by developing the Cyrillic script. Under the rule of the Krum's dynasty, the country rose to the status of a mighty empire and great power. The First Bulgarian Empire lasted until the early 11th century, when Byzantine emperor Basil II conquered and dismantled it. A successful Bulgarian revolt in 1185 established a Second Bulgarian Empire, which reached its apex under Ivan Asen II (1218–1241). After numerous exhausting wars and feudal strife, the empire disintegrated and in 1396 fell under Ottoman rule for nearly five centuries.

Greece is a country in Southeastern Europe, on the Balkan Peninsula. It is bordered to the north by Albania, North Macedonia and Bulgaria; to the east by Turkey, and is surrounded to the east by the Aegean Sea, to the south by the Cretan and the Libyan seas, and to the west by the Ionian Sea which separates Greece from Italy.

The country consists of an extremely rough, mountainous, peninsular mainland jutting out into the Mediterranean Sea at the southernmost tip of the Balkans, and two smaller peninsulas projecting from it:the Chalkidiki and the Peloponnese, which is joined to the mainland by the Isthmus of Corinth. Greece also has many islands, of various sizes, the largest being Crete, Euboea, Lesvos, Rhodes, Chios, Kefalonia, and Corfu; groups of smaller islands include the Dodecanese and the Cyclades. According to the CIA World Factbook, Greece has 13,676 kilometres (8,498 mi) of coastline, the largest in the Mediterranean Basin.

Under the reign of Philip II (359–336 BC), the ancient kingdom of Macedonia, initially at the periphery of classical Greek affairs, came to dominate Ancient Greece in the span of less than 25 years, largely thanks to the character and policies of its king. In addition to utilising effective diplomacy and marriage alliances to achieve his political aims, Philip II was responsible for reforming the ancient Macedonian army into an effective fighting force. The Macedonian phalanx became the hallmark of the Macedonian army during his reign and the subsequent Hellenistic period. His army and engineers also made extensive use of siege engines. Chief among Philip's Thracian enemies was the ruler Kersebleptes, who may have coordinated a temporary alliance with Athens. In a series of campaigns stretching from 356 to 340 BC, Philip II managed to ultimately subjugate Kersebleptes as a tributary vassal, conquering much of Thrace in the process. Philip II also fought against the Illyrian king Bardylis, who threatened Macedonia proper, and against Grabos II and Pleuratus in Illyria (centred in modern-day Albania). In his newly conquered territories, he founded new cities such as Philippi, Philippopolis (modern Plovdiv, Bulgaria), Herakleia Sintike (Pirin Macedonia, Bulgaria), and Herakleia Lynkestis (modern Bitola, North Macedonia).

Philip II eventually campaigned against the city-state of Athens and her allies in the Aegean region, as well as Thebes after the decline of its hegemony in mainland Greece. In the defence of the Amphictyonic League of Delphi and in conjunction with the Thessalian League, Macedonia became a key player in the Third Sacred War (356–346 BC), defeating the Phocians, commanded by Onomarchus, at the Battle of Crocus Field in 352 BC. While poised to launch a direct assault on Athens in 346 BC, the Macedonian king was met with an Athenian embassy that arranged the Peace of Philocrates. As a result, Macedonia and Athens became allies, yet Athens was forced to relinquish its claims to the city of Amphipolis (in modern-day Central Macedonia).

Macedonia (/ˌmæsɪˈdoʊniə/ MASS-ih-DOH-nee-ə; Greek: Μακεδονία, romanized: Makedonía, pronounced [maceðoˈni.a] ) is a geographic and former administrative region of Greece, in the southern Balkans. Macedonia is the largest and second-most-populous geographic region in Greece, with a population of 2.36 million (as of 2020). Part of Northern Greece, it is highly mountainous, with major urban centres such as Thessaloniki and Kavala being concentrated on its southern coastline. Greek Macedonia encompasses entirely the southern part of the wider region of Macedonia, making up 51% of the total area of that region. Additionally, it widely constitutes Greece's borders with three countries: Albania to the northwest, North Macedonia to the north, and Bulgaria to the northeast.

Greek Macedonia incorporates most of the territories of Macedon, a Greek kingdom ruled by the Argeads, whose most celebrated members were Alexander the Great and his father Philip II. Before the expansion of Macedonia under Philip in the 4th century BC, the kingdom of the Macedonians covered an area corresponding roughly to the administrative regions of Western and Central Macedonia in modern Greece. The name Macedonia was later applied to a number of widely-differing administrative areas in the Roman and Byzantine empires. With the gradual conquest of south-eastern Europe by the Ottomans in the late 14th century, the name of Macedonia disappeared as an administrative designation for several centuries and was rarely displayed on maps. With the rise of nationalism in the Ottoman Empire, the name Macedonia was revived in the nineteenth century as a geographical term, and for educated Greeks it corresponded to the ancient historical land. The economic ascent of Thessaloniki and of the other urban centres of Macedonia coincided with the cultural and political renaissance of the Greeks. The leader and coordinator of the Greek Revolution in Macedonia was Emmanouel Pappas, today considered a Greek hero along with the unnamed Macedonians that fought with him.

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.