This is foremost a note to my future self, a reference for the next time I get stuck. If someone else finds it via a search engine, bonus!
Using the Azure CLI (command line interface) on Microsoft’s Azure Government cloud is mostly like using their regular, non-gov cloud. Cloud computing on Azure has been a positive experience for me overall. But I’ve gotten burned a few times when the gov cloud operation needs a different command than what’s shown in the official Azure CLI docs.
Each case took me several unhappy hours to figure out. The reason I was seeing a certain error message was unrelated to the reasons other people on the internet were served the same message. No one on StackOverflow asks, “might you be using the Azure gov cloud?”