It froze Japans financial assets, we didnt want to interfere majorly because we were still in the middle of the depression. We didn't bomb Hiroshima until the bombing of Pearl Harbor (god bless the fallen troops) thats when we declared war against them and the first troops were sent in.
It was one of the reasons the US joined the war. With that, the Germans and Central Power started to lose (they had no chances after the sinking and the Zimmermann telegram)
To hold any mail that violated the acts
Booker T. Washington. Booker T. Washington was one of the foremost African-American leaders of the late 19th and early 20th centuries, founding the Tuskegee Normal and Industrial Institute, now known as Tuskegee University.