Article mentions that Hitler didn't drink alcohol, but he sure was a speed freak and took a lot of other drugs. Also worth mentioning that the Axis and Allied sides both utilized amphetamines heavily during the war.
I think that alcohol use on the battlefield has declined largely because in modern warfare, the kind of impairment that you get from alcohol is a huge liability, but the kind of edge that a driver or pilot can potentially get from a strong stimulant can really benefit the effort.
Edit: https://www.vice.com/en_us/article/3bjp4y/total-intoxication...