"In war, one must take sides, and you had best choose mine" speaker in the video game "Hades" (4)

I believe the answer is:

ares

(Other definitions for ares that I've seen before include "Olympian" , "Greek god of war" , "War-god" , "Land measures" , "Belligerent god" .)

I've seen this clue in The Washington Post.

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