[1] Before the annexation, Lee Gyu lost many comrades after a bloody battle with Japanese enemies in Korea as part of the Righteous armies along with Kang Hui, Lee Dong-ju, and Jo Dong-sik, who also developed the righteous army movements in the late Joseon Dynasty.

In October 1910, he and his followers consisting of graduates of military service schools and volunteer soldiers during the Korean Empire, crossed the Yalu River and the Duman River, and lived as hunters in the forests of Naedosan, Ando-hyeon, Jiandao, Jilin Province.

On October 23, 1919, they reported their name to the Provisional Government of the Republic of Korea in Shanghai, the organization changed their name to the Korean Righteous Military Administration Office at their recommendation, and reported its organizational structure to the Provisional Government Secretariat under the name of President Lee Gyu (李圭).

In addition, hundreds of hunters were deployed in all directions, making it an independent struggle unit with considerable military power.

This group maintained close contact with other armed groups, such as the Korean Independence Army and the Alliance Association, that were active in the nearby area, and achieved great results by crossing the Duman River numerous times and raiding military police, police stations, and government offices under the Japanese Government-General of Korea.

[2][1] In August 1920, the Japanese army retreated to Yeongan-hyeon (寧安縣) due to the Battle of Qingshanli.