The attack lead to the US declaring war with Japan which also caused the m to join the Allied forces for help
The railroad was able to aid others in communication, transportation, and products. An example is mail. People used trains to transport mail in order to communicate with others. Traveling was also cheaper and safer now with railroads since it was able to get people where they needed to be much more quickly. And finally products, manufacturers could send supplies to other places in a short amount of time much more easily.
Hope this helped
