Why did Sulla’s capture of Jugurtha cause rivalry between Sulla and Gaius Marius?

The rivalry between Gaius Marius and Sulla originated during the war against the Numidian king Jugurtha. While Marius was the commanding general, his quaestor, Sulla, successfully negotiated the capture of Jugurtha in 105 BCE by convincing King Bocchus of Mauretania to betray the Numidian leader.1234

This event sparked jealousy in Marius because the victory was credited to Sulla’s diplomatic maneuvering rather than to Marius himself. The tension escalated further when Sulla had the scene of the capture engraved on his personal seal, a move that Marius viewed as a provocative display of arrogance. This incident marked the beginning of a long-standing feud that persisted throughout their careers, eventually contributing to the political instability of the late Roman Republic.231