Key point: North Korea doesn't care about normal military doctrine.
Normal military doctrine says that an attacker should outnumber the defender by at least three to one at the point of attack.
But since when is North Korea normal? The Korean People's Army (KPA) believes that it only needs to amass a two to one edge on the battlefield to defeat U.S. and South Korean troops. What's more, North Korea seems to believe that it can win using the same tactics that Chinese troops successfully employed in the Korean War.
"The DPRK [Democratic People's Republic of Korea] believes that the average KPA soldier is physically, mentally, militarily, and politically better trained and prepared for war than any individual soldier the North Korean will meet on the battlefield.... With this type of mental indoctrination, it is likely that many KPA military personnel would rather fight to the death than surrender," says a U.S. Army study of North Korean tactics. The study, titled "Threat Tactics Report: North Korea," was published in October 2015 by the U.S. Army's Training and Doctrine Command.
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