[dkjaudyeqooe]

Indeed, this isn't spy craft, it's the reality of multiple citizenship.

The reality of entering a country of citizenship is they want you to use that country's passport.

For instance you have to use your Australian passport to enter Australia.

To enter the US you should use your US passport (and have your other passports handy), but strictly speaking you don't need any passport to enter the US as a citizen, you just need to be able to establish your identity.

This can sometimes lead to tricky situations, because another party, the airline, considers you to have only one passport (declared for your ticket) and definitely not change passports from one end of a trip to the other.

The stupid thing that almost no one provides for people who have multiple passports. Often you have to choose to declare the one that makes your life the easiest, or at least breaks the fewest rules.