No matter how big their military is, Kim Jong-un won’t be able to defend against this.
Mount Paektu, which lies on the borders of North Korea and China, is now in danger or erupting again after its last devastating lava spill in 946AD.
It was so powerful it formed a 5 kilometre crater, known as a caldera, at its summit and produced enough ash that it even showered Japan – almost 1,100km away.
Scientists have issued stark warnings saying it needs to be monitored as a matter of urgency, saying the threat is “very real”.
The mega-volcano attracted interest from scientists between 2002 and 2005 when experts feared activity due to several mini-earthquakes in the region. It has now been confirmed as being active and could burst into life in the future.
Some 1.6 million people live within 100km of the volcano.
The fear of eruption is so great North Korea has even made a rare collaboration with Western scientists.
The secretive nation has even gone as far as to let US and UK experts inspect the volcano from inside the Kim Jong-Un ruled country.