Immediatly lead to a treaty that limited the number of nuclear weapons in the U.S. and the Soviet Union
I believe the correct answer to this would be A). Epidemics
The u.s troop numbers peaked in 1969 with president Johnson who approved an increased maximum number of U.S troops to 549,500.
Well, this could be interpreted in a general view. A good way I've found to understand history especially is to almost interprete right now. I know this is not the answer but it is helpful. How can different view cause conflict? Simple you want to fight for your views because you believe they are right.