A lot more can be done than invade! Moving out aircraft carriers and battleships into position. Hitting their nuclear capabilities. Taking out their military capabilities. Then allowing South Korea to invade and unify Korea under a capitalistic, democratuc and 1st world industrialized nation! Assisting South Korea by shelling NK's military capacities (plants, bases, air strips, planes, military bases etc.)
We don't have to send one troop!
War is never that "easy". I thought we had learned that from the Bush administration.
This romantic view of war a disturbing trend as well. The North and the South had the same type of view going into the Civil war. And we all know what kind of a bloodbath that was.
Invasions and nation building is never easy (aka Afghanistan, Iraq, Vietnam), however, this wouldn't be a full-scale invasion and we won't have to nation build (South Korea will)!
Russian invasion, with no caring of nation building was easy. Our tactics in the Kosovo vs Serbia war was easy. Desert Storm was a piece of cake. Cast Lead was easy.
When the goal is to attack and weaken the enemy and not invade occupy and build the nation, then many complications are removed, if one opponent is vastly stronger than the other!