Brainliesttt ! describe the truman doctrine event in your own words. : )

To keep other european powers from threatening its empire in america, spain sent soldiers, settlers, and?

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.

The battle of fort wagner is most important for which