The development of railroads was one of the most important phenomena of the Industrial Revolution. Trains provided supplies and equipment and a lifeline of the army. Trains made a big impact on the citizens. Railroads were visible symbols of industry and modernity during the Civil War.
American settlers, Native Americans, and Mexican Americans faced some conflicts in the Mexico cession. They all faced legal, economic, and social discrimination problems.
In short, conflicts over land and water.
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In addition to his seminal Institutes of the Christian Religion<span>, </span>Calvin wrote commentaries<span> on most books of the Bible, confessional documents, and various other theological treatises. Originally trained as a humanist lawyer, he broke from the Roman Catholic Church around 153</span>
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John Adams is one of the two, and I think </span><span>Thomas Jefferson is the second.</span>