I am not sure why you chose the Legions of Ancient Rome as an example. The Roman Empire collapsed from within just as the United States Empire is crumbling from within now. I am of the opinion that the military should not be in charge of taking decisions in a country.
Military people are good at war not at governing. The Legions of Rome were loyal to their general for the most part. That is why generals could walk with their armies in Rome and declare a dictatorship - under whatever general was leading the army at any given time.
Cesar did that, Marc Anthony did the same, etc. I would not want generals leading any country ... I look at Burma, Thailand and such countries where the military is in charge (Pakistan also) and I see nothing good.
There were Roman generals during the time of the Republic that would remind the Senate of its duty to the People. Once the Republic was gone and Rome became an Empire it became a matter of sufficient resources, ambition and loyalty as to whether one would remain Emperor or be capable of challenging the Emperor for power. Today, if we lived with a military with Roman morals and ethics - thank God we do not, the Commandant of the United States Marine Corps would be the most dangerous threat to the existing government..
This is a difficult question, since we are not quite the same republic as Rome. I would hope we do not over react as they did and have another civil war. We do not need that or want that.
Peaceful protesting has always been the most effective way to enact change in our country. But to answer your question, I believe they would exhaust all measures of diplomacy before taking to arms.
The legions of ancient Rome would not have had the strength to stop it!".
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.