Union soldiers were fighting for the freedom of slaves and reuniting the states. Confederate soldiers fought for protecting the confederacy. Yes, it did change over the war.
Are there options or anything like that
The role of The Protestant Reformation in the history of the United States of America. Over the centuries there had been many reform efforts within the Catholic Church, The term Protestant was not initially applied to the reformers, but later was used to describe all groups protesting Roman Catholic orthodoxy.
That depends on what you consider to be resistance. Most of them stopped during the 19th century after numerous acts and policies that were widely accepted since everyone wanted to avoid bloodshed. Some would argue that it lasted until the 1920s, when the final acts of attacks were held in countries such as Utah, but this was on a really small scale.