I normally don't talk about subscription sites because the goal of the Free Genealogy Resources blog is to promote resources that cost little or no money. However, it just came to my attention that one of the subscription sites is offering an amazing resource at no cost for a limited time. Footnote, a large database of historical documents, has partnered with the US National Archives to bring us Civil War Documents. Through the end of June, anyone can access the collection for free.
Documents available include service records for soldiers, the 1860 US Federal Census, pension records, amnesty papers, survivor's certificates and more. A large number of photographs (over 6,000) can be searched or browsed. Maps are also available. The collection includes a section on Abraham Lincoln, which contains photographs and documents.