Which emperor did Bheema defeat in order to enable Yudhistra to perform the Rajasuya Yagna?

Bheema defeated the powerful demon king, Jarasandha, to enable Yudhishthira to perform the Rajasuya Yagna. Jarasandha was a formidable foe who had imprisoned many kings, and his defeat was crucial for Yudhishthira to assert his authority and seek recognition as an emperor. The victory over Jarasandha not only removed a significant threat but also solidified the Pandavas' position in the region.