They still ARE at war. The one started in 1950 never ended; a truce was called. The truce has been violated, over and over, by both sides but mainly by the DPRK. I truly doubt that DPRK could get support from either China or Russia should they decide to jump the Z, and the generals know it. Should Kim decide to move to open attack he might find himself assassinated by his generals, who seem to live in the real world instead of Kimilsongland.