Yun Hui-sun, also known as Yoon Hee-Soon (1860–1935), was a Korean militia leader and organizer, known for her work opposing Japanese colonial rule of Korea. After the Japanese assassination of Korean Empress Myeongseong caused national unrest in 1895, Yun began supporting Korean militia troops, also known as righteous armies. Yun sent threats and declarations of war to Japanese army commanders and Korean soldiers who served Japan; actively promoted the cause of Korean independence among women; and composed dozens of nationalistic battle songs. Her battle song Ansaram euibyeong ga (Song of the Women's Militia) was the first Korean militia song composed by a woman and the first militia song written down in the Korean language. In 1907, Yun created and led the first all-woman righteous army,