Correction: A previous version of this article miscalculated Moon’s advocated decrease for the standing force of the South Korean military.

In a move to cushion the blow of a gradually downsizing military, South Korea will soon install a border-area surveillance system that detects ground vibrations near North Korea.

The “unmanned ground surveillance sensor” will send alerts to remote units whenever it detects vibrations around the 2.5-mile-wide Demilitarized Zone dividing the two Koreas, South Korea’s Defense Acquisition Program Administration (DAPA) said on Thursday.

The equipment will “minimize the power gap in military forces caused by the decrease in the number of