Second Korean War
So North Korea has officially declared war.
What wikipedia article is backed up from a citation from the BBC, who've quoted KNCA as saying:
The long-standing situation of the Korean peninsula being neither at peace nor at war is finally over.
What the KNCA actually said though was:
The Key Resolve and Foal Eagle joint military drills staged by the U.S. and the south Korean puppet forces were the actual nuclear war rehearsals that activated nuclear strike means including B-52 capable of carrying nuclear warheads and nuclear-armed submarine.
This is a brazen-faced violation and encroachment on AA and all the north-south agreements and an unpardonable provocation and infringement on the DPRK's sovereignty and supreme interests.
The unprecedentedly acute and serious state of political and military emergency prevailing on the Korean Peninsula urged the DPRK to terminate at an early date the geopolitical disaster, neither a war nor peace, which has lasted century after century on this land, and take a bold decision to guarantee the national sovereignty and regional stability.
They then go on to explain that the armistice agreement -- which is the agreement between the North and the US that there will be no hostilities -- has been repeatedly violated by the US, and that they're taking this nuclear bombing rehearsal as a hostile act, and therefore they must also start to disregard the agreement for defensive reasons. Again, they only talk about the possibility of them carrying out counter attacks to defend themselves.
The only offensive threat that they make is saying that they of course reserve the infamous American idea of a defensive pre-emptive precision strike... and by American logic, such an act is of course valid
There's a bunch of other quotes in the BBC story that I can't find an original source for at all, and they sure as hell don't provide references like Wikipedia does
So from the looks of what the North said, this is just a continuation of the situation that you linked at the beginning of this thread.
The US rehearsed the nuclear bombing of the North, while the South threatened the survival of the North. In response, the North is making all sorts of counter threats and promising to defend themselves...
The idea that they're being the aggressor here is totally down to how you spin the story.