List 5 countries the usa has military bases.

What’s the negative consequences of telegraph ? explain in your own words

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.

Explain the importance of carnegie, morgan, and rockefeller on the american political scene of the early 1900's.