Answer:
In the 19th century (before as well as after the Civil War), railroads brought many changes to the United States of America. For one thing, trade and commerce increased, with a complementary expansion of industry, especially in the North. For another, settlement of the 'wild West' was made easier, as was increased growth of areas already settled. For yet another, military operations became more sophisticated and generally more power-packed: during the Civil War, Union and Confederate forces could be quickly reinforced or moved to areas of special need due to the rapid transportation provided by railroads.
The Arab Spring in Libya deposed Gadaffi of power and began the Libyan Civil War because of the power vaccum left after the death of Gadaffi.
<span><span>1. </span><span>Nullification doctrine is said that the
states residing within the Union is undocumented. Supposed Aliens and sedition
acts was passed to punish those who opposed the federal laws and regulations. However,
it was Thomas Jefferson who thought that this act may affect the Bill of Human
rights, so he decided to make an equally unconstitutional doctrine that states
if a government would implement a law, a state could refuse to follow it. John Calhoun, soon adapted the Nullification
doctrine</span></span>
