Samhan
The Samhan period of Korean history (also Proto–Three Kingdoms Period) comprises confederacies of Mahan, Jinhan, and Byeonhan in central and southern Korean peninsula, during the final century BCE and the early centuries CE. These confederacies were eventually absorbed into two of the Three Kingdoms of Korea by the 4th century CE. The Samhan period is generally considered a subdivision of the Three Kingdoms Period.
Read more about Samhan.