History of North America

One problem that faced the railroads before civil war was no standard gauge had been agreed upon?

Incorrect information:

The statement is correct; however, "before" needs to be replaced with "in the early development of."

Correct statements:

- One problem that faced the railroads in the early stages of development was that no standard gauge had been agreed upon.

- In the early development of railroads, the lack of a standard gauge was a significant challenge.