The famous nurse known for her role in the Crimean War is Florence Nightingale. She revolutionized nursing practices and established hygiene standards that dramatically reduced the death rates in battlefield hospitals. Nightingale's approach to nursing emphasized compassion, thorough record-keeping, and evidence-based practices, laying the groundwork for modern nursing. Her use of statistics and advocacy for healthcare reform highlighted the importance of sanitation, proper nutrition, and adequate medical care. Nightingale's legacy persists today, with her birth date commemorated annually as International Nurses Day, celebrating the valuable contributions of nurses worldwide in health care and humanitarian efforts.