What duties did the United States Sanitary Commission (created in 1861) perform?

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.

Explanation:

The organization became the U.S. Sanitary Commission, approved by President Abraham Lincoln on June 13, 1861.

The U.S. Sanitary Commission, the only civilian runed organization recognized by the federal government, would serve as the focal point for civilian assistance to the military. U.S. Sanitary Commission volunteers advised on the physical and mental health of the military and assisted in the organization of military hospitals and camps, they also aided in the transportation of the wounded. They distributed medical supplies, food, and clothing where it was needed. All of this was accomplished at no cost to the government and it was all thanks to the fundraisers, held to get donations and create a self funding facility to help those in need.