According to RFA (Radio Free Asia) North Korea has ordered that even soldiers in the rear to sleep wearing military uniforms. North Korea is fostering a sense of war crisis within its military. I doubt that this is just a threat against South Korea. North Korea is got to be up to something. North Korea may be preparing for a physical attack like past Cheonam sinking incident. Or it may imply that is in dire circumstances in need to raise tensions even in its rear bases. Whatever the reason, South Korea must observe North Korea's behavior closely and make a full defensive preparations.