Boot camp: Those first grueling weeks when a soldier begins to earn his stripes.
Shirt camp: A topless day of throwing snow on yourself and your fellow soldiers on a frigid mountain?
The Reuters video above shows the icy drills South Korean soldiers have to perform for cold-weather training. According to The Telegraph, troops must throw snow on one another, dive into frigid waters and patrol on skis, among other exercises.
A Herald Sun report explains that a group of more than 200 soldiers is picked each year to participate in the training. The drills were conducted on a mountain in Pyeongchang, about 110 miles east of Seoul, in temperatures as low as minus 22 degrees.
Below, see photos of the soldiers braving the elements: