Choongmoogong (Korean: 충무공전 : 난중일기편, 亂中日記편) (retitled War Diary in Europe and the US) was the second video game released in 1996 by Trigger Soft Corporation (Korean:(주)트리거소프트), developed in cooperation with independent developer HQ Team led by Tae Gon Kim. It is based upon Yi Sun-shin's War Diary, Nanjung Ilgi. War Diary was one of the first real-time strategy games based upon Korea's military history.