Shih-Shan Henry Tsai writes that the Yongle Emperor sent his eunuch Yang Sanbao into <answer>Tibet</answer> in 1413 to gain the allegiance of various <answer>Tibet</answer>an princes, while the Yongle Emperor paid a small fortune in return gifts for tributes in order to maintain the loyalty of neighboring vassal states such as Nepal and <answer>Tibet</answer>. However, Van Praag states that <answer>Tibet</answer>an rulers upheld their own separate relations with the kingdoms of Nepal and Kashmir, and at times "engaged in armed confrontation with them."
Where did the Yongle Emperor send Yang Sanbao?
Tibet