During world war ii, the battle of the coral sea was significant because it

In the declaration of independence, the colonists listed the complaints against the british government to prove they were being treated unfairly. what was one complaint in the declaration of independence?

At the beginning of the war, why was hitler allowed to continue his aggression without resistance from other european countries

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.