After the Korean war ended, North Korea stipulated that only a certain number of Marines were allowed on the Peninsula in order for them to make peace. Probably because we beat the crap out of them
Hence, there's only about 300 Marines stationed on the peninsula - I'm not one of the lucky ones.
I work at NIOC - the Navy Intelligence Operations Command in Kunia. We have to be on American soil, to be able to do the things that the peninsula can't do.