The management of foreign affairs that administered the diplomatic relations was one of the most important offices within the Great Turkish Empires. A crowded committee that was able to speak and write in various languages would work in the capital city of the Asian Hun State. The registrars, translators, and couriers were in operation in the capital city of the Western Hun Empire. Bitaçin officials within the Tabgaç and Gok-Turk people, Bitakçi and tamgaçı officials within the Turgis and Uighur people, and tuğracı officials (official applying the cipher) in the Oguz people were charged with the execution of the laws that were taken in reference with the foreign policies by the state councils. The official seal of Tan-hu (ruler) or hakan (ruler) would be affixed to the letters arranged. The envoys had immunity unless they were engaged in espionage.
The foreign representatives that were suspect of suspicious behaviours would be imprisoned or they would be assigned to reside in a far and distant place of the country for a specific period. There were concentrated activities of espionage carried out by the Chinese people within the Hun and Gok-Turk Empires (For example, see above in the assassination of Kapagan Kagan) and by the Byzantine within the Western Hun Empire.
Great struggles were fought against these activities. For example, the emperor Rua had prohibited the entrance of the Byzantine renegades that provoked the people for rebellion under the title of merchant, traveller, player, etc. within the Hun lands. He had also specified this issue with a special article within the agreement that he concluded with the Byzantine. In order to cause the collapse of the Turkish State, the Chinese people had given particular importance to bring discord between the members of the Turkish ruler's dynasty and the governors and to cause them to quarrel with one another. The miserable conditions of these efforts that led to the domination of Chinese people over the 1st Gok-Turk State were also reflected within the inscriptions. The hypocrisy of the Byzantine that did not comply with the written agreements (the Balkan military expeditions were organised due to this reason in the years of 441 and 447) was expressed to the face of their envoys by Turk-sad.
Similarly, the Sasani people would kill the Turkish envoys and emissaries through intrigues. The Turks would generally conclude their agreements with promising. However, they could possibly confirm this agreement with the ceremony of "testimony" that turned the reciprocal solidarity into the state of blood brotherhood. This testimonial ceremony was widespread among the Turkish people. The foreign affairs of the Turkish policy were doubtlessly oriented towards the maintenance of the survival of the state and particularly the organisation of the commercial relations to this effect (see Economy).
However, the policy had also another significant aspect of internal affairs. This was based on the integration of the "disorganised Turks" that we have observed as one of the tasks of the Turkish State ruler. It has been understood that this target was accomplished in the period of Tan-hu Mo-tun for the first time in the Turkish history (209-174 BC). Actually, he seemed to have integrated and united the Turks that had not immigrated towards the Near East and Europe within the governmental union of the Hun Empire in Asia.
Afterwards, it has been observed that various Turkish groups that had played important historical roles in several regions of the world were within the union of the Hun State in the beginning. This situation was also confirmed by the Chinese, Byzantine, Latin, Indian and Islamic resources. The work of the integration of the "Disorganised Turks" was accomplished by the Gok-Turk State for the second time in history.
This target was included within the main political lines of the Great Ruler Kapagan (692-716). With the efforts to establish the Turkish union, "he had a political understanding and comprehension that could be nearly considered as a modern opinion".
As it has been known, Turks have spread in a disorganised manner again upon the collapse of the Gok-Turk sovereignty.