Gnaeus Domitius Corbulo

Corbulo implemented rigorous training and discipline reforms for the legions in Syria. He weeded out corrupt officers, improved supply lines, and drilled the troops, transforming them into an effective fighting force.

Corbulo commanded Roman forces in the East against the Parthian Empire. He captured the Armenian capital Artaxata and installed a Roman client king, Tigranes VI, securing Roman influence in the region.

Emperor Nero, jealous of Corbulo's popularity and success, ordered him to commit suicide. Corbulo obeyed, taking his own life. His death removed a potential rival but also a capable general from the Roman military.