<span>Urban: of, relating to, characteristic of, or constituting a city (New York City)
Suburban:an outlying part of a city or town b: a smaller community adjacent to or within commuting distance of a city (Key Biscayne, FL)</span>
Because the U.S supposedly helped other countries
The border states during the Civil War were the slave states that didn't leave the Union. These states included Delaware, Kentucky, Maryland, and Missouri. Kentucky - President Abraham Lincoln considered Kentucky's loyalty to the Union as an important factor in the Union winning the Civil War.
The result of the Mexican war
The phrase ¨In order to form a more perfect Union¨ would be the best answer. Hope this helped