A lot of world globes and Atlases were sold during this time period so people could look up were these countries were on the globes and atlases, The second main reason why a lot of globes were sold during this time period was because they started making them differently so they could mass produce them so for that reason the cost came down considerable.
When I was in elementary, jr high, and high school, there were still some of those roll-down maps from that era, showing "Manchukuo". :^)