Because the Silk Road was too long to travel so they wanted a shorter way to Asia.
I am 100% positive that it's <span>africa, asia, </span>Europe
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.