Is there anyone who never underwent guerrilla training during their active service?

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I served in the '04 class.
When I was first assigned to my unit, the seniors were all volunteering to go,
so as a newcomer, I was naturally excused and couldn't go...
The following year, I had gained some seniority and thought about going,
but because there weren't enough personnel for guard duty at the gate, they ended up "forcing" those who wanted to go to stay behind...
Strangely, I remember there were many people in my company (platoon) who were actually eager to go to guerrilla training.
Since my duty station was in Busan, I spent the cold wave season quite "warmly,"
and I don't remember much heavy snow, except for that one massive blizzard in 2005 that was supposedly a once-in-a-century event. lol