Clara Barton was an American nurse who founded the American Red Cross. As a child, she showed an early interest in nursing by caring for injured animals and helping her brother recover from a serious fall. She went on to work as a teacher and clerk before serving as a nurse during the Civil War, where she became known as the "Angel of the Battlefield" for her medical care of soldiers. After the war, Barton founded the American Red Cross in 1881 and served as its first president for over 30 years, establishing it as a humanitarian organization to provide relief for victims of conflicts and natural disasters.