I'm writing an essay, and one of the elements of it has to do with the development of military technology throughout history. I've noticed that there is a quickly increasing and disturbing trend in terms of the ratio between destructive power and the manpower required to utilize it. Essentially, despite the labor required to build and maintain modern weapons, it does not appear to make up for the necessary manpower required in the past. For example, the Napoleonic era where combat mostly relied on massed musket and rifle fire. This allows for a greater consolidation of power ultimately making it more difficult to resist centralized authorities.
Anyway, I am interested if there is any sources that specifically detail the detail the destructive potential of military technology over the last few centuries. Possibly an infographic showing the explosive yield of bombs, shells and rockets over a few centuries. Any assistance would be appreciated.