What were the key developments that explain America's rapid expansion across the continent in the post civil war years?" "Which factor do you think was the most important and why?

For this discussion you are to post a response to the following question. “What were the key developments that explain America’s rapid expansion across the continent in the post civil war years?” “Which factor do you think was the most important and why?”

Note the due date for posting your answer to the discussion question is Thursday, February 6th. The due date for posting responses to classmates in Saturday, February 8th.

Your answer should be no shorter than 250 words. After you answer this question you must return to this discussion assignment several times during the week and respond to the postings of your fellow classmates. A minimum of two such responses are required. If you post only the minimum number of responses you will earn no more than a B for this discussion assignment. The more responses you post together with the quality of the work on your answer to the discussion question will determine your score on this assignment.

If this is your first time using Canvas’ discussion feature here are directions for using this tool. When you get to the discussion page (the one you are viewing now) you want to read over the question. When you are ready to submit your answer you want to click the reply button at the bottom and then post your answer. You will need to return to the discussion section over the next few days to read over what your classmates’ have posted and then enter your responses to their postings. You do that by simply clicking on the reply button at the end of their posting.