Macedonia (Greece)
Macedonia (; , "Makedonía" ) is a geographic and former administrative region of Greece, in the southern Balkans. Macedonia is the largest and Greek region, with a population of 2.38 million in 2017. The region is highly mountainous, with most major urban centres such as Thessaloniki and Kavala being concentrated on its southern coastline. Together with Thrace, and sometimes also Thessaly and Epirus, it is part of Northern Greece. It also contains Mount Athos, an autonomous monastic region of Greece.
Irredentism
Some Macedonian nationalists promoted the irredentist concept of a United Macedonia () among ethnic Macedonian nationalists, which involves territorial claims on the northern province of Macedonia in Greece, but also in Blagoevgrad Province ("Pirin Macedonia") in Bulgaria, Albania, and Serbia. The United Macedonia concept aims to unify the transnational region of Macedonia in the Balkans (which they claim as their homeland and which they assert was wrongfully divided under the Treaty of Bucharest in 1913), into a single state under Macedonian domination, with the Greek city of Thessaloniki ("Solun" in the Slavic languages) as its capital.