Subject: Re: War, currencies and jurisdictions
The wonderful thing was I bought a Coke at a little store, paid with a $5 American bill and received more than $5 Canadian in change.

Reminds me of what happened with us when we landed in Sydney, Australia after an umpteen hour flight that left Los Angeles at 1:00 AM. (It was 21 hour flights starting from Chicago.)

In the terminal my wife badly needed a Coke, I went over the a soda machine but it only took AUD bills, no credit cards. The tour guide who met our group came over and said, "I'll buy it for you, no problem, it's not that much."
I figured it out later, it was about $3 USD. For a 12 oz can of coke.