The legendary humanitarian known for her work with the Red Cross is Clara Barton. Founded in 1881, Barton established the American Red Cross and served as its first president, dedicating her life to providing emergency assistance and disaster relief. Her efforts during the Civil War and in subsequent humanitarian crises brought significant attention to the need for organized care in times of conflict. Barton's legacy is marked by her unwavering commitment to aiding those in need and her influence in establishing principles of modern humanitarianism.