Kim Jong-un, who was declared Supreme Leader of North Korea yesterday, issued his first terrifying threat of war today.

North Korea may "smash the stronghold of the puppet forces" in the South in retaliation for "hideous crimes" committed during the mourning period for Kim Jong-il.

Threats of war from Kim Jong-un's father, though terrifying, were routine. His father threatened and attacked the South multiple times, but he never started a war or launched a nuclear offensive or used his artillery force to devastate Seoul.

Unfortunately, no one knows what to expect from the 28-year-old Kim Jong-un. We hope he's just making noise to show people he's not to be messed with. Notably the NYSE-traded South Korea ETF seems unfazed.

Here's part of a statement from the National Defense Commission of the Democratic People's Republic of Korea (via BNO News):

"When the whole nation is overcome with grief over the great loss, only the South Korean puppet group committed thrice-cursed crimes," the Commission said in a long statement. "The DPRK National Defense Commission, above all, discloses before the world and the nation the truth about those crimes of the South Korean puppet group."

The Commission said the South's actions created the impression that a 'golden opportunity' had arrived to lead the North to a system change. "The South Korean authorities put the three services of the puppet army on an emergency alert and ordered them to adopt combat posture, creating a war-like atmosphere on the ground and in the seas and air," it said.

North Korea also condemned the South for spreading anti-DPRK leaflets during the mourning period and preventing certain groups and citizens from visiting Pyongyang to convey their condolences. "Traitor Lee Myung-bak spearheaded all these operations," the Commission said, referring to the South Korean president.

It added: "[Lee] sought to attain his foolish goal by taking the advantage of the mourning period, and if that fails, to lead the DPRK to 'contingency' and 'change of system'. From the olden times, it was considered inhumane to raise one's fist at the neighbor visited by misfortune and seek profits."

Read more at BNO News.