Also Alt, if the Saudis are our only friends then that brings half the middle east with them. While Iran has been busy so has Saudi Arabia.
Aside from the US the members of the Saudi Coalition in and around Yemen are: Saudi Arabia, Kuwait, Bahrain, Qatar, Sudan, Egypt, Jordan, Morocco, Pakistan and Somalia.
Now if this blows up and becomes a wider war than I expect some defections from that group. Most likely candidates are Pakistan, Sudan and Somalia.
My question is this: At what point does the rhetoric become that we are already involved in a cold world war. There are two theaters already:
Middle East and the South/East China Sea
The countries with military forces in those areas are: America, Britain, France, Australia, Turkey, Belgium, Saudi Arabia, Egypt, Kuwait, UAE, Qatar, Philippines, Japan, Vietnam, India, Morocco, Sudan, Pakistan, Afghanistan, Jordan, Russia, China, Iran, Syria, Iraq, Lebanon, Cambodia
If this thing goes hot I expect to see at least Pakistan and Afghanistan switch sides. That also ignores the militant groups on both sides like the Free Syrian Army, Houthis and Hamas that only complicate things.