A gold color metal and enamel device 1 3/16 inches (3.02 cm) in height overall consisting of a disc horizontally, the upper half blue and the lower half white, surmounted by a Taeguk overall a scarlet letter "X" behind a scarlet letter "I" both fimbriated gold. Each of the four "arms" of the letter "X" bearing two five-pointed gold stars, and the letter "I" bearing two five-pointed gold stars, one in the center and one in base, all above a gold scroll bearing the inscription "PRIDE OF THE PACIFIC" in blue letters.
The design was suggested by the shoulder sleeve insignia and history for the IX Corps. The "I" superimposed on the "X" simulates the Roman numeral IX (9). The Taeguk is for the Korean War with nine gold stars referring to the nine Korean campaigns, the center star to the UN offensive and the CCF intervention, First UN counter-offensive, CCF spring offensive, UN summer-fall offensive, Second Korean winter and Korea summer-fall 1952, Third Korean winter and Korea summer 1953, the two parts of the taeguk also alluding to the Republic of Korea Presidential Unit Citation for Korea 1950 and Republic of Korea Unit Citation for Korea 1952-1953. The one five-pointed gold star in the base of the letter "I" is for service in the Asiatic-Pacific Theater, World War II. The letter "I" also alludes to the word "International" and refers to the international composition of IX Corps during the Korean War where its subordinate elements included units (ten as indicated by the letter "X") from Turkey, Philippines, British Commonwealth, France, Columbia, Thailand, Greece, Ethiopia, Netherlands and the Republic of Korea. The horizontally divided blue and white background was suggested by the flag base of all distinguishing flags authorized for Corps. The letter "O" formed by the design refers to the "Orient."
The distinctive unit insignia was originally approved for the IX Corps on 17 March 1969. It was redesignated for the 9th Regional Support Command and amended to change the motto on 24 October 1997. The insignia was redesignated effective 16 April 2008, for the 9th Mission Support Command.