Forum:Meaning of IV in SCAR Team logo

I was wondering if someone could answer a question. I am a big fan of CoD, and have played except AW, B01, and WaW. However, I had a question about the SCAR Team logo from Infinite Warfare. The logo, which is in the form of a circle, says Special Combat Air Recon on top and S.C.A.R. on the bottom. In between is a skull, and the skull splits the acronym SATO, which stands for Solar Associated Treaty Organization, a faction in the game's campaign. Lastly, within the skull's mouth is the symbol "VI". In Roman numerals, this would be the number 6. Upon further research, however, there is no SCAR Team 6. My question is, what does the IV (or 6) stand for/mean? I have searched the Call of Duty Wiki, and can't find an answer. Can anybody help?