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Kim Jong-un's hermit kingdom looks to be on a collision course with the West after repeatedly ignoring calls to de-escalate military operations in the region.

The crazed dictator tested a long-range hydrogen bomb five times more powerful than the Hiroshima nuke this morning – days after firing a ballistic missile over Japan.

And Pyongyang's battle plan for a devastating nuclear assault has been laid bare as war rhetoric reaches crisis level between the rogue state and US.

Daily Star Online can now reveal where North Korea will strike should war come – hitting the continental US with an onslaught to kill as many as 493,000.

(Image: DS/GETTY)

North Korea is considering strikes on key cities across the US, with four being identified on a map seen in North Korean propaganda in the "war room" with Kim.

These target are marked under the subtitle "US Mainland Strike Plan".

Trajectories of missiles can bee seen sketched out on the giant hanging map pictured behind the tyrant.

The lines appear to leading towards San Diego in California, Austin in Texas, Washington DC, and the islands of Hawaii.

Death tolls were simulated assuming use of North Korea most powerful warhead, believed to be 40 kilotons.

This weapon is more than twice the strength of the Hiroshima bomb.

Photos of the map were released as Kim chaired an "emergency meeting" back in 2013.

North Korea was much less significant threat in the first half the decade and Kim has ramping up his nuclear capability year-on-year.

In 2017 alone, Kim has tested more missiles than his father Kim Jong Il did in his whole 17-year reign combined.

Pyongyang believes securing ICBMs will allow them to secure the future of their regime – avoiding military intervention which removed dictators from nations such as Iraq and Libya.

(Image: AFP) (Image: AFP)

Nuclear disarmament campaigner Derek Johnson, the executive director of Global Zero, condemned the march towards war by Kim and Trump.

He said: “The potential consequences of a military confrontation between the United States and North Korea can’t be overstated.

"Every diplomatic effort must be made to avoid any scenario that risks the use of nuclear weapons. The time for crisis talks is now.”

(Image: GETTY)

After Trump's comments Mr Johnson urged the world to remember Trump has "unfettered authority" to make good on the threat.

He warned "at any moment he can pick up the phone and order a nuclear strike".

US Secretary of State Rex Tillerson told Americans they could "sleep well in their beds" as he talked down the chance of war.