Wikipedia
Sujagi
The Sujagi is a flag with a Hanja (Chinese ideogram) 帥, pronounced su in Korean, that denotes a commanding general. The whole term literally means, "Commanding general flag". Only one sujagi is known to exist in Korea. The color is a faded yellowish-brown background with a black character in its center. It is made of hemp cloth and measures approximately 4.15m x 4.35m.