Gija Joseon
Both Korean and Chinese legends, including reports in the "Book of Documents" and the "Bamboo Annals", state that a disgruntled Shang prince named Jizi, who had refused to cede power to the Zhou, left China with a small army. According to these legends, he founded a state known as Gija Joseon in northwest Korea during the Gojoseon period of ancient Korean history. However, scholars debate the historical accuracy of these legends.