Analysis of information sources in references of the Wikipedia article "Joseon–United States Treaty of 1882" in English language version.
The United States and the Kingdom of Choson (Korea) engaged in their first official diplomatic interaction on May 22, 1882, when representatives of the two states signed a treaty of amity and commerce at Chemulpo, Korea. The treaty had been negotiated with the assistance of Chinese officials, since China had for many years had influence in Korea's foreign affairs due to a historical tributary relationship between the two countries. In fact, Korea was an independent state and this fact was acknowledged in the treaty. It was the first treaty Korea signed with a Western nation.