I spend 3 years in Korea and most ot the time I was with my South Korean Special Forces units, they chased North Korean commandoe who infiltrate into the south to recon targets and did kill many of them. Some got away by riding the bus to Seoul and hiding among the population. It still happens today and the South Koreans have to be on guard all the time.
The old missiles will be gone in a few days, the old tanks will stop running, then the poor conscrips be out of food and will surrender for food.
I feel sorry for the north since they are now smaller, ill fed and without real medicine. There will be thousands dead on both sides due to a poor country controlled by crazy people who will have to start a war for food.