That's great. My brother was deployed there from 2010 to 2011 before joining Space & Missile Defense Command for his last assignment before getting out. He would have zero reason to lie about it unless UAE, Saudi, and Qatar had already purchased their own and we had oversight.
2010 and 2011? I'm not suggesting your brother is lying. Nor do have I seen a Defended Asset List for the CENTCOM AOR from 2010. Anyone who wrote it is sitting in a Florida retirement home by now. There's likely a misunderstanding in here somewhere. So as a guy with more than a few ounces of experience and knowledge - I've, more recently, lived more than two years of my life in Qatar wearing a uniform and the Air Force still pays me for what I know - let me explain to you why we don't defend other countries' stuff (at least directly).
1. If we do it for one country, we have to do it for others that ask or risk insulting them. All our GCC friends like to compare the size of their johnsons. America protecting their stuff makes their willy a little bigger in their own eyes and creates shrinkage in the eyes of their neighbors'. That's not good in a world where its tough to keep everyone happy. I've also helped answer these questions from our GCC friends before.
2. We don't have a lot of stuff. Patriot batteries are a globally managed high demand asset. The SECDEF signs off on their deployments. We don't have enough of them. Patriot units optempo is high and as a result, their retention of talented Soldiers suffers. Adding "stuff" defend only increases that optempo and exacerbates the problem. I've been to a Patriot battery in the Qatari desert. Great Americans one and all but I'll just say it made me grateful I joined the Navy.
3. What if we fail? What if we sign up to defend a friends stuff, and we fail, and it goes boom. Makes us looking pretty bad right? Why sign up for that grief and liability. I can tell you that if we failed, in Arab culture, they would expect us to rebuild or replace whatever was destroyed. If not, we just lost a lot of wasta.
4. The stuff we're defending is far more valuable in a fight than any civilian infrastructure.
UAE, Saudi and Qatar all have Patriot and THAAD.
As part of the agreement with Qatar to have Patriot in their country, some of the units defend their US asset as well as about half the city of Doha.
Nope. Qatar has far more Patriot batteries in their country than we do.
Now all that said......if something were to come after a friend's stuff, we see it, our stuff isn't at risk, and can act......I'm pretty sure we take action. But that's not an agreement between our nations.
God Bless. I'll shut up now.