section_path: History/Ancient Korea
section_name: Ancient Korea
paragraph_text: Ancient Korea
  
  The Korean Peninsula was inhabited as early as the Lower Paleolithic period.
  
  According to Korea's founding mythology, the history of Korea begins with the founding of Joseon (also known as " Gojoseon ", or "Old Joseon", to differentiate it with the 14th century dynasty) in 2333 BCE by the legendary Dangun. Gojoseon was noted in Chinese records in the early 7th century. Gojoseon expanded until it controlled the northern Korean Peninsula and parts of Manchuria. Gija Joseon was purportedly founded in the 12th century BCE, but its existence and role have been controversial in the modern era. In 108 BCE, the Han dynasty defeated Wiman Joseon and installed four commanderies in the northern Korean peninsula. Three of the commanderies fell or retreated westward within a few decades. As Lelang Commandery was destroyed and rebuilt around this time, the place gradually moved toward Liaodong. Thus, its force was diminished and only served as a trade center until it was conquered by Goguryeo in 313.
  
  Beginning around 300 BC, the Japonic -speaking Yayoi people from the Korean Peninsula entered the Japanese islands and displaced or intermingled with the original Jōmon inhabitants. The linguistic homeland of Proto- Koreans is located somewhere in southern Siberia / Manchuria, such as the Liao River area or the Amur River area. Proto-Koreans arrived in the southern part of the Korean Peninsula at around 300 BC, replacing and assimilating Japonic-speakers and likely causing the Yayoi migration.