system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did ancient armies survive off drinking beer/wine instead of water all the time?

Wouldn't they be dehydrated and probably hungover everyday?
gpt
Important distinction to make - beer and wine today are extremely strong compared to what was drunk in ancient times.

Most of those drinks would be heavily watered down (the alcohol works to kill anything in the water), so while the drinks themselves could be similar to modern drinks in strength... they were not consumed that way.