Why did the territory lost by germany prove to be fatal in the treaty of versailles ?

Need it now explain gorbachev’s policy of glasnost. how did this policy change the soviet union?

The louisianna purchase was controversil because

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.