There are 5 main reasons why the US joined World War 1 I don't know which reasons you have already listed so I'm just gonna say all 5 the 1st one would be German atrocities in Belgium 2nd would be economic interests 3rd would be sinking of the Lusitania the 4th of the unrestricted submarine warfare and the 5th would be the zinmerman telegram
b. Fewer goods were made by hand
During World War II minority groups used to rally under the slogan, "Double V" These two V meant victory against fascism in Nazi Germany and Japanese Imperialismas well as in the United States in terms of equality for African Americans.
