by Kyle Mizokami
In the last seventy years, the Republic of Korea Army (ROK Army) has evolved from a constabulary force into one of the largest, most powerful, technologically advanced armies in the world. This remarkable evolution is entirely due to the original 1950–53 invasion and war by neighboring North Korea. This existential threat has never truly gone away, with North Korea consistently threatening—and preparing for—a second, successful invasion.
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http://nationalinterest.org/blog/the-buzz/could-south-koreas-army-stop-invasion-by-north-korea-22435