Military

A little North Korean soldier family (plus chaebol heiress, natch)

Soldiers and doctors facing every imaginable disaster in a war-torn country

Real-life war games as a meet cute macguffin

One can never be too sure about those underground military zombie quarantine facilities

Weeding out military corruption on the way to vengeance/justice

Technically the king's guard, but same diff

In this case, they're the bad guys

Former special forces soldiers turned beer salesperson and toast truck operator

Is it even a Republican Era c-drama if the military isn't involved?

All the goings on at the Kanglim Outpost