Unknown Patch STU 1SQ

I was digging through some pouches I got recently and found this. Any idea what it is for? Thanks!

ISF Special Tactics Unit, 1st Squadron

DeOpressoLiber wrote:ISF Special Tactics Unit, 1st Squadron

"Units that do not suffer from these inabilities are those which belong to the Iraqi Special Forces (ISOF). Units such as the Special Tactics Unit (STU) and Counter Terrorism Service (CTS) are highly trained in not only basic infantry tactics but also call for fire missions and they most have certified English speaking JTACs." from http://foreignpolicy.com/2015/06/16/its-time-for-an-american-course-correction-in-iraq-and-heres-how-to-do-it/

From Wikileaks friendly fire report: "1st Squadron, STU, conducts an HI-driven cordon and knock IVO AL DOURA, ARAB JABOUR 29 1345C DEC 09 to detain Mu'ayad Muzhir Khamas Al Obaydi in order to disrupt AQI terror networks within Baghdad." It also states the following information: "Unit name: 1st Squadron, STU; Type of unit: ISF"

"Australia’s Special Operations Task Group is strengthening the capabilities of the Iraqi Security Force counter-terrorism through its Advise and Assist mission in Iraq.
The Task Group is responsible for advising and assisting three battalions of the Iraqi Security Forces’ Special Tactics Unit, an elite force drawn from Iraq’s Counter Terrorism Service." from https://news.defence.gov.au/media/media-releases/australian-special-operations-task-group-work-iraq

This leads me to believe that the STU stands for "Iraqi Security Forces Special Tactics Unit" which is being advised by both USSF and the Australian SOTF.
However, I can't seem to find any clear information on this exact unit.

Thanks for the info!