2. Foundation and Development of Kojoson

Ironwork

(1) Northern Nations

The nation of Puyo grew around the Sungari River basins in Manchuria; Koguryo rose in the environs of the mid-Yalu River. Okcho stood in the plains of Hamhung on the eastern coast, and Tong'ye developed to the south. The Okcho and Tong'ye Kingdoms came under the control of Koguryo shortly thereafter. Puyo existed as a national entity for a long time, but was finally annexed as a part of Koguryo.

The nation of Puyo grew around the Sungari River basins in Manchuria; Koguryo rose in the environs of the mid-Yalu River. Okcho stood in the plains of Hamhung on the eastern coast, and Tong'ye developed to the south. The Okcho and Tong'ye Kingdoms came under the control of Koguryo shortly thereafter. Puyo existed as a national entity for a long time, but was finally annexed as a part of Koguryo.

(2) Southern Nations

The nations of Mahan, Chinhan and Pyonhan, along with other small states existed south of the Han River. In Samhan, rice farming flourished and dam reservoirs such as Pyokkol-je in Kimje and Susan-je in Miryang were built.

In addition, during the fifth and the tenth lunar months, their people offered sacrifices to heaven and engaged in songs and dances.