During the 1920s and 1930s the political and economic challenges and trials encountered were:
1. Unemployment – many of the citizens were jobless
2. The great depression was encountered by the United States in 1929 because the stock market was crashed which caused a run on the banks.
3. There are strikes in Great Britain, the British economy was become slowly to recover
4. The United States had a post-war economic boom.
Many aspects of Roman law and the Roman Constitution are still used today. These include concepts like checks and balances, vetoes, separation of powers, term limits, and regular elections.
I think it was the Battle of Lexington and Concord.