 If you liked
Youjo Senki
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 ...then you might like
Golden Kamuy
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If you are in the mood for military uniforms, rifles, and warfare, these both give off similar tones (at times). Golden Kamuy is much more focused on comedy and adventure, but the military aesthetic is strong in both. They are also both set in historical wars (though the war in Tanya seems to be a parody/alternate version of the real world).