This is the 7724th most frequent Japanese word.
反軍
"反軍" means "anti-military" or "opposed to the military."
Here, "反軍" is used as an adjective to describe someone's attitude against the military.
彼の態度は明らかに反軍的でした。
His attitude was clearly anti-military.
"反軍" is used to specify a stance or position taken by someone in opposition to military actions or organizations.
彼女の演説は反軍の立場を明確に示していました。
Her speech clearly demonstrated an anti-military stance.
In this case, "反軍" is used as a noun representing the concept or ideology of being against the military.