As far as I know the army said (and still says) 4 hours is enough short term in the field not routinely. If you’re saying they suggested soldiers only need 4 h

As far as I know the army said (and still says) 4 hours is enough short term in the field not routinely. If you’re saying they suggested soldiers only need 4 hours of sleep long term, do you have any citations for this? Links to the studies they used to justify it. Because you can read the studies on CO2 and judge the methodology yourself.