The document provides an overview of Korea's natural, political, social, and cultural environments. Korea has a total area of 85,000 square miles and lacks natural resources. It has a mountainous terrain and many rivers. Politically, Korea was first established in 2333 BC and was divided into three kingdoms between 400-668 AD before being reunified. The Mongols invaded Korea in 1238. Culturally, Koreans originated from Tungusic peoples and agriculture has historically been important due to fertile lands. Buddhism and Confucianism became the main religions starting around 700 AD.