Two theorized ideas.
1: N. Korea will launch it's 'NUKES' at what it depicts is infidel (These are Mining explosives.) and cause us or Russia to just nuke them, which in-turn will seep into South korea, starting a big miscommunication between countries, thus they turn on each other, break allies, cause a Nuclear war, WW3.
2: It ends up more like fallout, and America builds Powered Armor and Giant Robots with lasers and Mini-Nukes, while china makes stealth tech and all terrain tanks.