There could be:
1. UAE and SA will start war against Iran- most probavly islands in SoH and Iran' littoral area
2. Usa wil provide air cover and logistics of such campaign.Without direct involment of ground troops ecxept protection of vital assets.
3. Some poor countries will send their troops, in exchange for money or oil to join coalition..
4. EU will vote for strong resolutuon saying that it is unacceptable to further ruin human tights, rule of Law and democrcy in region..
in short, 2:0 for Vatican.