He made those who opposed him slaves
The flapper is a symbol because the emergence of the flapper girls in the 1920's. The 1920's were a mostly properous time in which young girls in search of fun would wear flappers to parties. This became a symbol of rebellion and flouting social norms.
I believe the correct answer is Bacon's Rebellion.
It was an event which happened in 1676 when lower classes rebelled against the system in which they were not being treated equally as the upper classes. This was the first rebellion of such nature and it lead to greater democracy in the States.
The charter called for the self determination of all nations. In contrast, however, the allies were the remaining imperial powers, which made Roosevelt reluctant to pressurize Great Britain to grant independence to countries such as India.