Corbulo is best known for his strict discipline and ability to revitalize demoralized troops. When sent to the East, he found the Syrian legions lazy and ill-equipped. He subjected them to harsh training and hard labor, famously stating that the enemy should be defeated with the pickaxe (entrenching tool) as much as the sword.
His campaigns in Armenia (58โ63 AD) were masterpieces of logistics and strategy. Overcoming rugged terrain and severe winters, he captured the capitals Artaxata and Tigranocerta, forcing the Parthian nominee Tiridates to flee. Even when later Roman commanders blundered, Parthian respect for Corbulo's skill helped secure a favorable peace treaty.
Despite his military brilliance and unwavering loyalty, his popularity made Emperor Nero paranoid. In 67 AD, Nero ordered him to commit suicide. Corbulo obeyed without hesitation, shouting 'Axios!' (I am worthy!) as he fell on his sword, becoming a symbol of traditional Roman virtue.