United States Sanitary Commission
The United States Sanitary Commission (USSC) was a private relief agency created by federal legislation on June 18, 1861, to support sick and wounded soldiers of the United States Army (Federal / Northern / Union Army) during the American Civil War. It operated across the North, raised an estimated $25 million in Civil War era revenue (assuming 1865 dollars, $525.82 million in 2025) and in-kind contributions to support the cause, and enlisted thousands of volunteers.
Source: Wikipedia — United States Sanitary Commission (CC BY-SA 4.0)