The Korean Kingdoms refer to the historical states that existed on the Korean Peninsula before the unification of Korea. The three main kingdoms were Goguryeo, Baekje, and Silla, which thrived from the 1st century BCE to the 7th century CE. Each kingdom had its own culture, language, and political systems, contributing to the rich history of Korea. In addition to these three kingdoms, the Gaya Confederacy also played a significant role in early Korean history. The kingdoms often engaged in trade and warfare, influencing each other's development. Eventually, Silla unified the peninsula in the late 7th century, marking the beginning of a new era in Korean history.