Both Abraham Lincoln and Jefferson Davis wanted to avoid a war between the North and the South.
It would be all of these. During world war 2 it is the United States that supplied almost everything in the allied war effort. Also the United States take longer route and also a hard campaign to combat the German U-boat for supremacy and stable supply route for the allied forces.
Evidence of attacks have been found
Some of them are poor working conditions and the poor living conditions as well, low wages, child labor and of course which is obvious pollution hope this helps out on your assignment or question have a good day and be positive