 Some authors consider that at that time, labels reflecting collective identity, such as "Bulgarian", changed into national labels from being broad terms that were without political significance.On the eve of the 20th century the Internal Macedonian-Adrianople Revolutionary Organization (IMARO) tried to unite all unsatisfied elements in the Ottoman Europe and struggled for political autonomy in the regions of Macedonia and Adrianople Thrace.But this manifestation of political separatism by the IMARO was a phenomenon without ethnic affiliation and the Bulgarian ethnic provenance of the revolutionaries can not be put under question.