The subject of this study is an attempt to investigate the early Byzantine Balkan limes in the northern Balkan region. Although this topic has been widely discussed in the past by a number of scholars, there is a need for reconsideration of some thesis and ideas, throughout the results from the newest archaeological excavations. We believe that a detailed research of the problems associated with existence, structure, effectiveness, permeability and security around the borderline, in great part will contribute towards answering many questions connected with the overall fall and disintegration of the early Byzantine system of government and administration and questions around the serious cultural decline. Most of the problems around the limes are connected with the strategic reorganization for strengthening and parallel decay, disintegration and general reorganization of the settlements inside the Balkans. This is made by, and for the needs of the local communities during their struggle for survival in a time of climate change, depopulation, earthquakes, constant barbarian raids and the begging of a permanent settling of the exogenous population. In the second half of the sixth and the seventh century, almost everything comes down to self-supporting and survival through decentralization and local management of resources, production, and defense. Byzantium only formally retained authority over part of the Balkan provinces, primarily through numerous strategic strongholds, mostly located offshore, on the islands and rarely inland. Only in those places in some form retained the urban elite and the military “aristocracy”. Newly established limes far south, placed to defend the coast from attacks coming from the hinterland, and purely formal authority in great part of the territories concurred during Justinian`s reign, indicate the complete disintegration of the administrative, tax system, the economic downturn and the collapse of the military system and organization in the Balkans. All the considered problems will be seen through the prism of the complex cultural, historical and socioeconomic framework of the period.