The library's databases give you access to magazines, journals, newspapers, reference books, video files, audio files, and podcasts. Some contain archival documents such as photos, songs, diaries and pamphlets. The Databases: How to Search Them guide (see link below) and the search help provided within each database will assist you with your search.
The Library of Congress has a large collection of primary sources including many relevant to Civil War research. See the "Exploring the Library of Congress Website" video on this page to better understand this website.
The following links are to particular collections and exhibits from the Library of Congress.
Examples of some of the Civil War books available online through Hathi Trust: