Deiges Harriet Tubman 1849. Harriet Tubman humanitarian activist working against African American slavery, is a Federal agent in the American Civil War. Born in Dorchester County, Maryland, USA. Her full name is Araminta Ross, she is the fourth of nine siblings. She pioneered to stand up against slavery. Harriet Tubman’s career in slavery became more and more favorable when the Slave Law was passed in 1850.