evidence: North Korea’s army said it will take the "substantial military step" of completely cutting off its territory from South Korea on Wednesday, after months of fortifying its heavily armed border. [...] "The acute military situation prevailing on the Korean peninsula requires the armed forces of the DPRK to take a more resolute and stronger measure in order to more creditably defend the national security," the General Staff of the Korean People’s Army (KPA) said, according to a notice on state-run news agency KCNA that referred to North Korea by the initials of its official name, the Democratic People’s Republic of Korea. [...] "If North Korea were to establish a new territorial clause through a constitutional amendment and sever its relationship with the South, the internal and external repercussions would be so great," Hong told CNN, suggesting Pyongyang is taking small steps in that direction.