You know how US is, they might try limited conventional conflict using only standing assets plus ROK and Japanese reinforments counting on Chinese and Russian nonintervention. Point of this would be not even to conquer DPRK but to tighten leash on ROK and Japan. Or maybe they completely flied off and are trying to test the defensive alliance DPRK and Russia signed few weeks ago.
You know how US is, they might try limited conventional conflict using only standing assets plus ROK and Japanese reinforments counting on Chinese and Russian nonintervention. Point of this would be not even to conquer DPRK but to tighten leash on ROK and Japan. Or maybe they completely flied off and are trying to test the defensive alliance DPRK and Russia signed few weeks ago.