18. Edith Cavell (1865-1915)
Cavell was a British nurse who served in Belgium and was executed for assisting Allied prisoners to escape during World War I. In August 1914 she joined the Red Cross and saved the lives of many soldiers from both sides, treating all with impartiality.
She was later arrested by the Germans and kept in solitary confinement for nine weeks along with her accomplice Phillipe Baucq. Eventually, they got confessions out of them and the two were sentenced to death and executed in October 1915.
She is commemorated with a statue in London for her success in modernizing nursing in Belgium and her dedication to helping all soldiers regardless of who they were.