Would a JW be disfellowshipped if they join a military (and are unrepentant about it)?

On my reading of a Anton Gill's 1989 book "The journey back from hell ", he speaks briefly about JWs in the concentration camps. According to Gill, one of the issues the Nazis had with this group was their unwillingness to do military service. Videos like this and this by Amnesty International indicates that they still rather suffer the consequences of prison and difficulties in finding employment than do military service, at least in South Korea. What would the consequences be for a Jehovah's Witness, from their religious organization, if they join a military? Would the person be excommunicated or disfellowshipped if this is found out? (In case it makes a difference, I am asking about a scenario where the person is unrepentant.)