Dr. Smith highlighted the first registered black nurse in the USA and others. Mary Eliza Mahoney. Harriet Tubman worked as a nurse during the Civil War, caring for wounded and sick soldiers, including formerly enslaved people and African American troops. She used natural remedies and other herbal treatments to heal diseases such as dysentery and smallpox among soldiers and freed slaves. In addition, she advocated for veterans. After the war, she fought for the rights of Black soldiers and nurses, eventually receiving a pension for her service. Dr. Smith was so passionate in sharing the natural information that she researched.