Clara Barton provided critical medical care during the Civil War, establishing the American Red Cross in 1881. She served as a nurse on the battlefield, delivering supplies and tending to wounded soldiers, effectively bridging the gap between government and humanitarian aid. Barton's efforts not only saved lives but also highlighted the need for organized disaster relief, influencing future emergency response frameworks. Her commitment to serving others in times of crisis remains an enduring legacy in the field of healthcare and humanitarianism.