How did differences between the english and american indian culture lead to conflict

Were african-americans allowed to serve in the military in wwi?

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.

What is the southernmost fort in what is today western ohio? what city is there today