What side was Dorthea Dix on union or confederacy?

Dorothea Dix was aligned with the Union during the American Civil War. She served as a Superintendent of Army Nurses for the Union Army, advocating for the care of wounded soldiers and the establishment of better medical facilities. Dix was also a prominent reformer for mental health care and worked to improve conditions in asylums, which aligned her with the Union's values of reform and humanitarianism.