The influential nurse known for her work during the Crimean War and founding modern nursing is Florence Nightingale. Her efforts in managing nursing care contributed greatly to reducing the mortality rate among soldiers, showcasing the importance of organized healthcare. Nightingale also established the first formal nursing school, the Nightingale School of Nursing, in London, and her principles of sanitary practices and patient care are still foundational in nursing education today. She is often referred to as "The Lady with the Lamp" for her dedication to patient care.