In China, warrior monks ate meat, non-warrior monks followed a vegetarian diet.
In India, the warrior caste ate meat, the priestly caste didn't.
In Ancient Athens, free citizens ate meat, but the slaves and poor ate grains.
In Ancient Greece, Spartan warriors
ate the infamous black broth of pork and blood, the helots grains and vegetables.
In Mongolia, the warriors ate meat and dairy, their conquered subjects rice and millet.
In Medieval Europe, the nobility and knights ate roast meats and game, while the peasants mostly gruel, bread, and legumes.
In Samurai Japan, even though the Buddhist discouraged meat, the Samurai broke this rule during
military campaigns.
In Africa, the Maasai warriors subsisted on milk, blood, and meat, while women and children mostly plants.
Perhaps this is another reason why they discourage meat...