Hello Shannon,
I saw your question about being able to come onto a US military base while in Korea. You would have to be signed on as a guest by a soldier. Even then you need an ID to enter the PX or purchase something at a shoppette. The Korean Army soldiers that live and train here on post with the US Army are not allowed into the PX's. If you teach in the Seoul area there are a few markets that have some American products. Take care, Joe