I really have no idea how we (the US) would stand up a meaningful sized army today if a larger war were to break out. Between obesity and the widespread use of psychological medications a huge swath of the population is ineligible to serve.
Ramp up Adderall production and drug em into soldiers
Sure, then we just need to ensure that any forward fighting force has reliable access to Adderall. Seems reasonable for modern warfare, after all it seems like the Nazis may have been delivering heroine to their front lines.