With a belligerent and unpredictable neighbour directly to the north, South Korea still maintains a large conscript military force. The government hopes to transition over time to a significantly smaller volunteer structure:
Six years ago the plan was to reduce troop strength 26 percent (from 680,000 to 500,000) by 2020. Then politics and North Korean aggression kept halting the reductions. Meanwhile it became clear that the birth rate was going lower, not increasing and within a decade there would be a lot fewer young men to conscript. At the same time the booming economy was producing more money, and technology, for more effective weapons and equipment that can replace soldiers. Another key element was that conscription was increasingly unpopular. The current crop of conscripts had parents who were born after the Korean war (1950-53), and only the grandparents (a rapidly shrinking group) remember why the draft is still necessary. Most of todays’ voters want to get rid of the draft. But when it comes time to actually make cuts, North Korea manages to change the subject.
Then came 2010, a year in which North Korea sank a South Korean corvette (which they denied, but the torpedo fragments recovered were definitely North Korean) and shelled a South Korea island (the northerners bragged about that). Since then, there has been more opposition to reducing military strength. But conscription is still unpopular and there are simply not enough young men to maintain current strength.
Meanwhile politicians are responding to public opinion and shrinking conscription service. It now varies from 21-24 months depending on the service. More conscripts can now serve in the police or social welfare organizations (for 26-36 months). Eventually, South Korea would like to have an all-volunteer force. But that won’t be affordable until the armed forces are down to only a few hundred thousand.
The Korean peninsula is one of the last remaining outposts of the Cold War. The sinking of the ROKS Cheonan is the most obvious sign that the two sides are still not at peace (the Korean War didn’t really end … it’s merely resting). Occasional shellings and attempted infiltration by North Korean special forces are frequent enough that they don’t get much international coverage. North Korea frequently accuses the South of similar kinds of provocation.