Historians have stated that the notion of foreigners in ancient India – those living outside of the Indian subcontinent – was often accompanied by the idea that one was a barbarian. Still, it seemed that groups who did not come from outside of these areas, as well as foreigners, were designated by the term
mleccha, which carried with it a barbarian connotation. Thus another distinction that was made between the mlecchas and non-mlecchas was area of habitation. Though they were considered a marginal group, the area characterize as the mleccha-desa (the natural border that separated their lands from that of the Aryans) was never permanent. Instead, it was defined by the changing ideas about the
Āryāvarta. Parasher noted that the only consistent areas dubbed as
mleccha desa were those regions inhabited by
primitive tribes who for long periods of time did not come under the sway of the
Vedic,
Buddhist or
Jain influence. Though the area of the Aryas expanded with time, the notion that was held over all of the land was that of purity. As Vedic literature refers only to the places and territories that were familiar to the Indo-Aryans, these lands eventually became part of the Āryāvarta. Parasher thus indicates that the Āryāvarta was designated as the region where the River
Sarasvati disappears is the
Patiala district in
Punjab. The
Pariyatra Mountains belong to the
Vindhya Range, probably the hills of
Malwa. The Kalakavana is identified with a tract somewhere near
Prayag. Still, other interpretations of the Āryāvarta refer to those areas where the
black antelope roams, for these areas are fit for the performance of
sacrifice. Early Vedic literature focused on defining the area of habitation of the Aryas for this land was considered pure; yet there is no actual reference to the mleccha country or behavior. Wherever the territory, though, the implications of naming such lands as the Āryāvarta is that any lands excluded from that area were considered impure. Further, there is evidence that Indians of the Vedic period actually had contact with people outside of the
Indian subcontinent, namely the
Persians. The
Achaemenid Persian Empire, which ruled over the
Indus River Valley during this time (522–486 BC) was not designated as mleccha, perhaps because they did not interfere with the Brahminical way of life. Later Vedic literature speaks of the western Anava tribes as mlecchas and occupying northern
Punjab,
Sindh and eastern
Rajputana. The tribes of the north were mlecchas either because they were located on the frontiers such as
Gandhara,
Kasmira,
Kambojas,
Khasas and therefore both their speech and culture had become contaminated and differed from that of Āryāvarta, or else, as in the case of southern India, they were once Aryas but having forsaken the Vedic rituals were regarded to mleccha status. ==Cultural behavior==