Edith Cavell was an English nurse who was executed for helping Allied soldiers escape from German-occupied Belgium. Having confessed her actions, she was sentenced to death and shot, despite the U.S. and Spain's attempts to gain her a reprieve. The Allies considered her execution to be outrageous, and widely publicized it, leading Cavell to become something of a WW1 hero.
Editors. "Execution of Edith Cavell in Brussels". The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=12336, accessed 08 February 2016.]