In a world where information reigns supreme, the legacy of the Signal Corps, as documented in this brief report about its activities in 1865, speaks directly to our innate human desire for connection, clarity, and understanding.The ability to transmit and receive information quickly, accurately, and securely remains paramount, with today's cryptographic security agencies facing challenges similar in principle to those faced by Signal Corps during the tumultuous years of the Civil War. This report reminds us that the quest for seamless connectivity remains a timeless pursuit, as relevant today as it was in the midst of a nation divided. The book is part of In the Year ... series, in this case 1865, for which Nimble Books reprints books that help the curious reader make a "transect" through the year in question. It is envisaged this will be especially appealing to readers who are looking for unfiltered, facts-first takes on history. It's also thought that these may be useful resources for those who write historical fiction. This particular volume is quite slim and was chosen as a test run. Most other volumes in the series are much longer. This annotated edition illustrates the capabilities of the AI Lab for Book-Lovers to add context and ease-of-use to manuscripts. It includes several types of abstracts, building from simplest to more complex: TLDR (one word), ELI5, TLDR (vanilla), Scientific Style, and Action Items; essays to increase viewpoint diversity, such as Grounds for Dissent, Red Team Critique, and MAGA Perspective; and Notable Passages and Nutshell Summaries for each page.