Why did the British colonists want to gain territory in the Ohio Valley ?

The byzantine empire weakened after asia minor

War of 1812 allowed the us to take control of lake erie

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.