During the first half of the nineteenth century, the central and western areas of new york were known as the "burned-over district" because:

The code talkers work contributed mostly to

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.

Atype of infrastructure that state governments maintain is schools roads libraries parks