An 1887 painting depicting schoolchildren in France being taught about the province of Alsace-Lorraine lost in the aftermath of the Franco-Prussian War that is depicted in the color black on a map of France.

Irredentism is any political or popular movement that seeks to claim or reclaim and occupy a land that the movement's members consider to be a "lost" (or "unredeemed") territory from their nation's past.

Many states formalize their irredentist claims by including them in their constitutional documents, or through other means of legal enshrinement. Such territorial claims are justified on the basis of real or imagined national notions of historic territorial, religious or ethnic affiliations. Irredentist policies may be advocated by nationalist and pan-nationalist movements and have been a feature of identity politics, and of cultural, and political geography. Irredentism may operate as a device for a government to redirect their citizens' discontent against outsiders.


Map of the territories claimed as "irredent" in the 1930s (in green: Nice, Ticino and Dalmatia; in red: Malta; in violet: Corsica)

The word (from Italian irredento for "unredeemed") was coined in Italy from the phrase Italia irredenta ("unredeemed Italy").[1] This originally referred to rule by Austria-Hungary over territories mostly or partly inhabited by ethnic Italians, such as Trentino, Trieste, Gorizia, Istria, Fiume and Dalmatia during the 19th and early 20th centuries.[2]

An area that may be subjected to a potential claim is sometimes called an "irredenta"; but not all irredentas are necessarily involved in irredentism.[3]

A common way to express a claim to adjacent territories on the grounds of historical or ethnic association is by using the adjective "Greater" as a prefix to the country name. This conveys the image of national territory at its maximum conceivable extent with the country "proper" at its core. The use of "Greater" does not always convey an irredentistic meaning.

Other Languages
العربية: وحدوية
asturianu: Irredentismu
azərbaycanca: İrredentizm
беларуская: Ірэдэнтызм
беларуская (тарашкевіца)‎: Ірэдэнтызм
български: Иредентизъм
bosanski: Iredentizam
català: Irredemptisme
čeština: Iredentismus
Cymraeg: Iredentiaeth
Deutsch: Irredentismus
Ελληνικά: Αλυτρωτισμός
español: Irredentismo
Esperanto: Iredentismo
euskara: Irredentismo
français: Irrédentisme
furlan: Iredentisim
galego: Irredentismo
հայերեն: Իրրեդենտիզմ
hrvatski: Iredentizam
Bahasa Indonesia: Iredentisme
italiano: Irredentismo
עברית: אירידנטה
ქართული: ირედენტიზმი
қазақша: Ирредентизм
македонски: Иредентизам
მარგალური: ირედენტიზმი
Nederlands: Irredentisme
polski: Irredenta
português: Irredentismo
română: Iredentism
русский: Ирредентизм
Simple English: Irredentism
slovenčina: Iredentizmus
slovenščina: Iredentizem
српски / srpski: Иредентизам
srpskohrvatski / српскохрватски: Iredentizam
svenska: Irredentism
Türkçe: İrredantizm
українська: Іредентизм