In Bucharest, where he had arrived after some weeks' delay, it became plain that he could not rely on the Wallachian Pandurs to continue their Oltenian-based revolt for assistance to the Greek cause; Ypsilantis was met with mistrust by the Pandur leader Tudor Vladimirescu, who, as a nominal ally to the Eteria, had started the rebellion as a move to prevent Scarlat Callimachi from reaching the throne in Bucharest, while trying to maintain relations with both Russia and the Ottomans. More fundamentally, Ypsilantis and other Greek leaders relied on the support of the Wallachians and Moldavians, on the base of their common Christian Orthodox faith, and underestimated the increasing resentment of Greek domination in the Principalities and the first stirrings of what would become Romanian nationalism.