What is the "great task" described in the gettysburg address?

Brainliesttt !me : ) describe the event : increase in islamic extremis in the middle east

“i now wished for the last friend,death, to relieve me.” what is equiano referring to?

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.