This article relies largely or entirely on a single source. (April 2023) |
The Internal Thracian Revolutionary Organisation (ITRO, Bulgarian: Вътрешна тракийска революционна организация, Vatrešna trakijska revoljucionna organizacija, VTRO) was a Bulgarian revolutionary organisation active in Western Thrace, the eastern part of Greek Macedonia (to the Struma river) and southern Bulgaria between 1920 and 1934.[1]