>>603718
I have to agree with the other anons, giving jailed criminals weapons and even crude training is too much of a risk to be worth it in anything but the most desperate of circumstances. furthermore, modern combat doesn't necessarily become more successful in a linear rate as formation size increases and even in the old days there are diminishing returns to total unit strength assaulting a position. However, many construction tasks do speed up linearly relative to workforce.
imagine the US pushing into an enemy country, your supply lines are choked because most roads leading to most sections of the front arent motorways, and even the motorways are choking. which is better, using your 2 million plus convict population as very inneffective soldiers which will consume somewhere between half and the full amount of supply replenishment? or using your 2 million plus convicts to expand every road into a three or four laner, supplying them with only cans of ham, bread, and basic tools. you wouldn't even need many MPs if you put a reward bounty on any that fled.
then again, when you have such a large criminal population an army should probably be "fixing" that issue at home rather than invading other countries.