This unfinished patch is from an older exercise that occurred each year called R.S.O.I. It was a joint exercise that received forces from every branch, from around the world and integrated them into the existing operations at Osan Air Base, South Korea. They stayed in "Tent City" and it lasted for 2 weeks to 1 month.
Approx: 3.5" x 4"
Color: 4 colors