Constituent Entities of the United States of Indonesia on a Map
For just under a year in 1950, Indonesia was a federation of at least 21 states, autonomous entities, and other entities of varying status. See if you can name them all.
I have moved some entities from their Wikipedia labels, as I believe they are inaccurate. I have also included five more entities that I believe should count based on personal research, though only one is an answer.