The name Principality of the Pindus, Aromanian: Printsipat di la Pind; Greek: Πριγκιπάτο της Πίνδου; Italian: Principato del Pindo is used in literature to describe the attempt to create an autonomous canton under the protection of Italy at the end of World War I, in July and August 1917, from Vlach-speaking population of Samarina and other villages of the Pindus mountains of Northern Greece during the short period of occupation by Italy of the district of Gjirokastra and regions of Epirus. The attempt was not successful and no such principality was ever formed. A declaration was made after the arrival of Italian troops in Samarina. In the immediate withdrawal of Italians a few days later, Greek troops appeared without meeting any resistance.
Since then there was no mention of any similar activity until 1941-2 when the territory of Greece were occupied by Italy, Germany and Bulgaria under the World War II. At that time, Alcibiades Diamandi, a Vlach from Samarina who also took part in the events of 1917, was active with an organization called in later literature with the name Vlach "Roman Legion" (at the time called "Legion" or "Roman Legion"). As part of the activity of the legion in the areas of mainly Thessaly (and Epirus, and West Macedonia), it was mentioned as an intention of Diamandi to create a semi-independent entity by the name "Principality of the Pindus" or "Independent State of Pindos" or "Canton". The "Legion" was never able to assert itself over the Vlachs whom it supposedly represented, nor over the local population until its de facto disbandment in 1943 due to the activity of the Greek Resistance and the Italian capitulation, leaving them without real support from the German command. In other sources, no name is assigned to the events of 1917 in Pindus.
The name "Principality of the Pindus" was given retrospectively and is used in bibliography literature mainly about the events of 1917 in Samarina. It was also used for the activity of Diamanti 25 years later, the so-called "Legion of the Vlachs" in 1942-1943. In sources closer to the events it is not used in 1917 nor in the period from 1942 to 1943. Indicatively, 12 years after the events in 1929, Nicolae Zdrulla wrote in the journal Revista Aromânească (Volume 1, No. 2) issued in Bucharest an article entitled "Mişcarea aromânilor din Pind în 1917" ("The movement of Aromanians of Pindos in 1917"). An archival study published in 2007 with documents of the same period (telegrams of the Vlachs to head of states of that time and correspondence of the Italian and Romanian Consulates) was entitled "The events of July–August 1917 in the region Pindos. The effort to create an independent state of Aromanians" mentions the word "Principality" only in the introduction, while there is no reference to it to the documents of the time recorded in this archival study.