Well, we can "involvement" question for the US. Draft all young men and women, and send them on a war of conquest ... they can't come back until they are successful. Then we will be more Roman-like. But that is not ... not ... something I would like! You can hate the draft, or hate the volunteer force, or just be a pacifist. If a pacifist, I can cook you up in a cannibal pot with the right seasonings. I hear pacifists are particularly tender ;-)
Yes, armies led by senatorial amateurs ... are often disastrous. Maybe a good enough reason to end civilian rule.