Could it be replace with inhaled courage? Does the issuance of booze before battle still occur in the world? Outlawed in some countries? What about a few tokes before battle, does pot have the same effect as Rum has had in many previous wars and battles? Canadians are known for their drinking exploits so without further ado, take a look at this...
https://web.viu.ca/davies/H101/Rum.C...tionalPost.htm
Fighting battles, putting your life on the line, seems to require some extraordinary courage that for some soldiers/sailors needs to be artificially induced by drugs. Marijuana is used in the medical field to reduce anxiety, so should it become a staple for a fighting force? Courage is necessary but does being impaired actually mean one's courageous enough to fight? Are brawls at local watering holes evidence?