National Geographic Map of the United States, 1940
This National Geographic map of the United States captures the country as it prepared to enter World War II. Two insets tell much about the moment it was published.
- Published: December 1940, in National Geographic.
- Population inset: the population shift between 1930 and 1940, following the droughts of the 1930s.
- Military inset: Army Service Command Areas and Naval Districts.
Map collectors value its balance of features and fine detail. History teachers use the insets to explain Depression-era migration and early defense planning.

