A peaceful person, or a nation that is not at war(noun)
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Use "nonbelligerent" in a sentence
"In the midst of the Suez crisis, he negotiated the continued flow of Saudi oil to the nonbelligerent nations."
"That nonbelligerent visual message mirrored what bin Laden said: Your security is not in the hands of Kerry, or Bush, or al-Qaeda."
"She will be in a hole the citizens of Iowa and New Hampshire voted her into, which she will not be able to dig out of because she'll be completely on the defensive as her opponents throw believable nonbelligerent dirt into her presidential grave."