Key points from this section:

• Prophecy of Civil War: The revelation, given on December 25, 1832, foretells the American Civil War, starting with the rebellion of South Carolina.
• Global Conflict: It predicts that the conflict will extend beyond the United States, involving other nations and leading to widespread calamities.
• Call to Stand in Holy Places: The section advises the Saints to stand in holy places and be not moved, as a way to prepare for the coming tribulations."

Read this chapter for free at https://byustudies.byu.edu/online-book/doctrine-and-covenants-contexts/section-87.