I think this question needs a personal opinion for the answer, but here's what i would say-
I believe that a two-party system, although it categorises the two sets of basic values of both Americans, excludes other beliefs and values that are silenced in a two-party system.
-Hope this is what you're looking for, maybe add more of your opinion to it?
It sounds like you are talking about the Lusitania. Is that correct?
The establishment of presidential term limits.
I would go for:
<span>North had a more widespread network of railroads available for delivering troops and supplies to the battlefield.</span>