This has been in progress since 2018.

Better late than never.

https://en.wikipedia.org/wiki/Occupied_Territories_Bill

The Gulf countries are also seeing the usefulness of US bases when a war starts.

Absolutely useless.

There is no process to “rejoin”. There is a process to “join”, and that now has a set of well-defined criteria: https://en.wikipedia.org/wiki/Copenhagen_criteria

There’s the Copenhagen Criteria for new members which requires a commitment to sign up to the Euro.

https://en.wikipedia.org/wiki/Copenhagen_criteria

Slow and painful, please