response: Are you familiar with the Imperial Roman Army? It operated from about 30 BC to about 476 AD.
original_response: Intetestingly,Imperial Roman army are the terrestrial armed forces deployed by the Roman Empire from about 30 BC to 476 AD.
history: Field marshal is the highest military rank Is that so? I know that military ranks are found in various services, like the armed forces, police and intelligence agencies. That is true OK. The rank system defines who has authority and what roles and responsibilities people have. That is true. There is so much respect for ranks and hierarchy in the military Well, the chain of command is an important component for organizing action collectively. That is true
knowledge: The Imperial Roman army are the terrestrial armed forces deployed by the Roman Empire from about 30 BC to 476 AD.