But, as before, the surrender did not greatly affect the internal affairs of the city, which continued to be managed by the citizens themselves. Nor did Venetian suzerainty last long. The campaign against the Eastern Empire ended most disastrously; the fleet was decimated by disease, and returned to Venice in 1172 a complete wreck. Venetian influence in Dalmatia was greatly reduced in consequence, while that of the Empire revived proportionately, and lasted until Manuel’s death in 1180. The country was, however, regarded as still in a measure connected with Venice, and in the treaty of peace which the latter made with William of Sicily in 1175 he promised not to invade “the lands which are under the rule of the Doge of Venice and of the Venetians,”[65] and Dalmatia was included among these. In the meanwhile Ragusa was developing international relations of a different character, _i.e._ with the Slavonic principalities of the interior. In the earliest times Ragusan territory was limited to a small part of the actual city, and for a long time did not extend beyond the walls. Constantine Porphyrogenitus informs us that it bordered on the two states of Zachulmia and Tribunia. The vineyards of the Ragusans were on the territory of these tribes, and the citizens paid a yearly tribute of thirty-six _numismata_ (gold pieces) to the Prince of Zachulmia, and as much to the Prince of Tribunia.[66] As the population increased they gradually extended their cultivation to the whole of these districts. The Tribunian vineyards were in the Župa of Žrnovica (Breno); those of Zachulmia in the Župa of Rijeka (Ombla), as far as Malfi, and in that of Poljice.[67] The tribute which the Ragusans paid for this privilege was called _margarisium_ or _magarisium_;[68] its value varied considerably. In 1363 that due to the Zachulmians was of sixty _ipperperi_, paid by the owners of the vineyards in proportion to the extent of their holdings. The Zachulmians, on their side, sent a cow, called the _vacca di margarisio_, which was divided between the Count of Ragusa and some of the _boni homines_ (_optimates_) of the city. Later, instead of one animal, several were sent.[69] Besides the tribute, the Ragusans paid a tithe in kind to the Slave princelings. From time to time they made special treaties with their neighbours, usually of a commercial character. By one of these, which Resti dates 831,[70] Svetimir, King of Bosnia, agreed to send 50 oxen, 500 sheep and goats, and 200 loads of oats to Ragusa, and to treat the Ragusans in his territory as though they were his own subjects, while they were to send him fourteen _braccia_[71] of red cloth. This indicates the city’s economic position, which enabled it to send manufactured articles from the west into the Balkan lands, while it bought from the latter the cattle and foodstuffs which its own limited territory could not provide. Even in later times most of the grain consumed by the Ragusans was imported from abroad.