The Trial of Trebonius refers to the military trial of the Roman soldier Trebonius for the killing of Gaius Lusius, his superior officer and nephew of the Roman General and Consul Gaius Marius. The trial serves to show Marius’ impartiality when dealing out justice that made him popular among his soldiers as well as the common Roman citizen. Valerius Maximus calls Trebonius Gaius Plotius. Because Plutarch says that this even contributed to Marius' third election as consul, this most likely takes place in 104 BC. This event does not refer to Gaius Trebonius, one of the allies and later assassins of Julius Caesar.