There are no southern or northern borders for them to "invade" Iran. American troops in Iraq, Afghanistan, and Syria have fled from there. The only place they could invade would be Azerbaijan(or use people who already work for them inside Iran), but then war against Azerbaijan is declared and the Azerbaijani government will be destroyed; they will have to flee the country.
NOTE: In the media opinion, as I said before, this is part of yet another attempt at a "victory narrative," as the "military operation" itself is. Since the original plans failed, they always have to have a new "card up their sleeve" for a new narrative:
- In the first days of the war, Trump said he had already won and that missiles and launchers were already destroyed.
- Various data on American casualties being hidden.
- Months later, Iran continues to launch missiles and drones DAILY and hit its targets.
- Media says there is no conflict but an "operation to open the Strait of Hormuz," even though Hormuz was closed because of the "operation".
- Now, a new narrative says there will be a territorial invasion with 3,000 soldiers... even though the US + NATO + 10 Arab countries invaded Yemen from 2014 to 2022 and lost, and Israel can't advance in southern Lebanon against Hezbollah.
The war narrative always has a new chapter where the US/Israel will win, will turn the tables, will have "something new."