This page recommends collections of sources likely to be of particular use for HIS 375.1 Aspects of War: The Civil War and Reconstruction. There are many such collections available freely on the Web. In general, it's better to look initially for a broad category (e.g. Florida history primary sources) than for a specific name or event. Once you've located a useful collection using Google or another search engine, you can use that site's search tools to locate more specific information.
With over 12 million articles available, the archive supports research across multiple disciplines and areas of interest, including business, humanities, political science, and philosophy, along with coverage of all major international historical events.