To achieve a scientific result in the historical research realm, it is necessary to recognize the correct sources. The study and research about the territory of Iran, especially the eastern borders, as one of the research aspects in the field of Safavid studies, is not exempt from this rule. The efforts of the Safavids to maintain control of the Kandahar state and the Jihun River region, and the confrontation with their north-eastern neighbors, the Uzbeks across the river and the Gurkans in India, initiated the transformation in the eastern borders of Iran's territory in the context of political and military relations. Considering the importance of the eastern borders of Iran as to the relations of the Safavids with the Uzbek Khanate and the Gurkans of India, the question here is: What range of sources can be applied to understand the course of transformation and the changes? The method adopted here is descriptive-analytic, to identify the typology of the subject sources, and introduce for assessing the issue at hand.
