I linked the UCMJ articles in a sibling comment. I think gp's description is correct for the UCMJ. Part of the problem IMO is that there are ~52 definitions of

I linked the UCMJ articles in a sibling comment. I think gp's description is correct for the UCMJ. Part of the problem IMO is that there are ~52 definitions of manslaughter/murder in the US (one for every state, civilian federal law and the UCMJ) so that answer is always highly context specific.