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Quote from Peter Sugar, ""The Early History and the Establishment of the Ottomans in Europe"": There the Hungarian-Wallachian alliance was still in effect, and Bayezid I now moved against Mircea. Once again, many Christians, mostly Serbs, fought in his army, including Kraljevic (the son of the king) Marko, the hero of another famous Epic, who died not in that battle, but in the Battle of Arges which Bayezid fought with the Wallachians on May 17, 1395. Mircea appears to have been victorious militarily, but his forces and resources were so depleted that he had to acknowledge the loss of the Dobrudja, into which Bayezid moved Turkish garrisons. He also had to accept the status of an Ottoman vassal and pay regular tribute. This arrangement lasted until the Danubian Principalities regained their independence. Although it created problems for the Romanians, it saved them from the much harsher treatment that went with direct Ottoman rule, especially during the centuries of decline.  "