Cannon fodder won't help. The Americans will destroy targets from afar. When they destroy all the infrastructure, the army will surrender itself. You forget how they fled Saddam's army. The main thing that Trump doesn't.
Read up. The North Koreans are fucking psychos who would probably fight until the very last kitten. There is no parallel with anything Middle Eastern. The entire country is an engine for war.
They're constantly finding new invasion tunnels dug into South Korea. The countryside will be riddled with hides and bunkers. Even if there's no more command there would still be guerrilla fighting everywhere.
They may be tiny and have crap weapons but they're fuelled by pure, burning hatred.
Too bad that fight wouldn't last that long, they may be war ready but their equipment is far from good for modern times. and if the war breaks out, they'd be in a rough position with enemy from all sides. Well you don't know how many of them would desert and surrender when they get the first chance.