What sparked the rapid growth of chicago from a small settlement in 1830 to america's fourth largest city by 1860?

Donald trump will plan to use his emergency powers to build the wall between the us and mexico, instead of shutting down the government again?

Explain how colonists treated the native americans and what happened to natives. ! ^^^ 12 points

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.