During my research I have repeatedly encountered the consequences of the 1866 Cholera epidemic that swept through the U.S. Army. By the time it was over, the military had suffered almost as many deaths as were experienced in the entire city of New York. Unsurprisingly, this event impacted large numbers of Irish emigrants, and as a result it is the focus of a chapter in my book The Forgotten Irish: Irish Emigrant Experiences in America. Given current events, I decided to take a more in-depth, visual look at the epidemic. The resulting StoryMap is my most extensive to date. It charts the spread of Cholera in 1866, along the way telling the personal stories of many of those affected. These men, women and children were disproportionately immigrants and African-Americans. To access the visualisation, just click here, or on the image below.