Ukraine
I wonder if this is in response to the West announcing the contemplation of placing engineers ( repair shops etc ) inside Ukraine for western mechanized armor?
regardless, North Korea has been posturing for a fight for many decades now, with no real combat. I suppose sending an engineering platoon/unit, with the inherent language barrier, wont yield that much result.
Now, if you start seeing North Korean casualties from the frontlines, thats when things will get interesting