Defectors claim they have grain and fuel supplies for at most three months war.
Their tactics are aimed to be as hard hitting as possible to grab hold of the South before the US troops arrive.
They have a network of tunnels that go under the DMZ were thousands of troops could stream over, as well as submarines with special-forces suicide troops who would land across the shores.
They also have agents in the South trained in terrorism and sabotage.
All their artillery is aimed at Seoul and this includes gas shells, so if there is a war, the city would be wiped out.
Of course, one on one with the US, after doing damage they will be destroyed.
BUT their hope/strategy is that they will have taken control of the South quickly, before the Americans come, and they can then negotiate with backing from China/Russia and everyone else against America.
And of course there is no way Russia or China will allow a nuke to go off near their borders!!!!