The most likely cause of an increase in the crime rate from 1920 to 1933 was the introduction of prohibition. Prohibition banned the production and sale of alcoholic beverages. This ban afforded the chance to make alot of money by producing and selling illegal alcohol. Prohibition also saw the huge increase in organized crime.
President Truman had the urge to use the atomic bomb against Japan because the American casualties would continuously rise unless the Empire of Japan surrenders. The thing that would make Japan surrender would be a cataclysmic event, and the bombing of Hiroshima and Nagasaki happened.
Some people find it helpful to move around while they read. Speak out loud as well, it will force your mind stay on track. Fidget some, get a fidget idem or just move some part of your bod, this especially helps when you are in school and do not have time for breaks. You can try changing positions every so often. Do not try to work all at once either, read in short burst and take a break to think about what you read. Keep distracting things out of your line of sight. It might also help to change the subject material once and a while.
I hope this is a little bit helpful :)
Answer:
I believe it's the Treaty of Echota