Between 1854 and 1856, the British and French forces fought with Russia. Nightingale, a nurse director in a British hospital, led 38 nurses to the front line to take part in the work of nursing the sick and wounded. Due to the confusion of medical management at that time, the quality of care was very poor, and the mortality rate of the wounded and sick was as high as 42%. Under such circumstances, Nightingale was determined to improve the sanitary conditions in the ward and to strengthen the care and nutrition of the patients. Six months later, the hospital mortality rate had dropped to 2.2 percent. This story spread throughout Europe. In 1860, she founded the world's first formal nursing school in London, England. Her nurse work monograph, became the hospital management, nurse education basic teaching material. In view of the fact that Nightingale has promoted the development of nursing work and nurse education around the world, he is known as the "founder of modern nursing". After Nightingale's death in 1910, the International Council of Nurses commemorated Nightingale's contribution to nursing. In 1912, her birthday, May 12, was designated as "International Nurses' Day", originally called "Hospital Day", also known as "Nightingale Day".