How would they even get ground troops into Iran? Definitely not from the North, they would have to transit through Russia/China.
To the West they could go from Saudi Arabia through Iraq, but would Iraq allow that movement? Similarly with the Eastern side through Pakistan, I don't know if Pakistan's government wants to be directly involved.
I guess the only other option is Turkey -> Azerbaijan into Northwestern Iran. I guess they could use the new Trump Peace Corridor or whatever they called it. Any direction they choose would be incredibly difficult terrain though
So while the site was down, there's been reports that Iran has allegedly launched attacks towards Turkish and Greek airspace, anyone have information on that? That seems like a big escalation that could draw in NATO
https://lemmygrad.ml/post/10864542/7839665