The Siege of Pyongyang was a battle fought between the Ming-Korea alliance and Japanese forces during Japanese invasions of Korea(1592-1598). The Japanese forces (led by Konishi Yukinaga)were roughly 18,000 in strength, and had spent the past few months setting up defenses in the castle of Pyongyang. But Ming-Korea alliance successfully repelled them.

Translating Joseon and Ming names of government office is really hard job. I think it's very inaccurate.