IV. Though Marius was annoyed at this, yet as he still thought Sulla beneath his jealousy, he employed him in his campaigns--in his second consulship in the capacity of legate, and in his third consulship as tribune;[168] and by his instrumentality Marius effected many important objects. In his capacity of legate Sulla took Copillius, king of the Tectosages;[169] and when he was a tribune he persuaded the powerful and populous nation of the Marsi[170] to become friends and allies to Rome. But now perceiving that Marius was jealous of him, and was no longer willing to give him the opportunity of distinguishing himself, but opposed his further rise, Sulla attached himself to Catulus, the colleague of Marius, who was an honest man, but inactive as a soldier. Sulla being entrusted by Catulus with all matters of the greatest moment, thus attained both influence and reputation. In his military operations he reduced a large part of the Alpine barbarians; and on one occasion, when there was a scarcity of provisions in the camp, he undertook to supply the want, which he did so effectually that the soldiers of Catulus had not only abundance for themselves, but were enabled to relieve the army of Marius. This, as Sulla himself says, greatly annoyed Marius. Now this enmity, so slight and childish in its foundation and origin, was continued through civil war and the inveterate animosity of faction, till it resulted in the establishment of a tyranny and the complete overthrow of the constitution; which shows that Euripides[171] was a wise man and well acquainted with the diseases incident to states, when he warned against ambition, as the most dangerous and the worst of dæmons to those who are governed by her.