With the report from NK News last month that North Korea had successfully launched another missile from a submarine off its east coast, the focus these days seems to be on its missiles. To be sure, Pyongyang’s ballistic arsenal is improving and will soon – if not already – pose a very credible threat to much of Northeast Asia. That includes Japan and many U.S. military bases in the Western Pacific Ocean, as well as South Korea.

However, what doesn’t make the headlines is the astonishing number of artillery pieces and multiple rocket launchers that North Korea has positioned just