Hard for westerners (at least this one)
The plot is confusing but I think the real problem for non-asians is that it is extremely hard to tell the characters apart. Ten korean guys of roughly the same age, in the same uniform and with a helmet most of the time, I didn´t know who was who (the names don´t help much either). The lieutenant and the other officer were easier, but the soldiers were just a mess in my head, unless there was a close-up , and only for the ones with the more peculiar faces, like the mechanic or the cook. I wish they would have enlisted a fat guy, a bearded guy, someone with a scar... for the platoon.
PS: In case you are wondering, I am not an ignorant or a racist who thinks all koreans look alike, please don´t go there. I´ve seen quite a lot of korean cinema. I just found it hard to tell the characters apart in this particular movie.