How did the napoleonic wars of the 19th cetury affect europe

Why did reagan have the united stars invade grenada

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 challenges did the united states face during the great depression? check all that apply. high debt high wages high unemployment a decline in the value of money and goods increased job stability failures of businesses and banks