It was written during the cilvil war
The Southerners thought the government was becoming too strong, and that they did not think the government had the right to tell them how they should live.
I researched this topic, and found that the first American combat troops arrived in Vietnam on <span>March 8, 1965, so your answer would be B!
Hope this helps, and happy studying!
~Mistermistyeyed.</span>
It was the "Transcontinental railroad" that great helped to further the Westward Expansion in the United States after 1865, since although it wasn't oficially completed until 1869, it began to reach further and further west beginning at this time.