Greater Albania is an irredentist and nationalist concept that seeks to annex the lands that many Albanians consider to form their national homeland. It is based on claims on the present-day or historical presence of Albanian populations in those areas. In addition to the existing Albania, the term incorporates claims to regions in the neighbouring states, the areas include Kosovo, the Preševo Valley of Serbia, territories in southern Montenegro, northwestern Greece, and a western part of North Macedonia. The combination of the populations of these countries and territories of other countries sustaining large ethnic Albanian communities enumerate to over 4 million people.