BLOODY BACKS. Derisive American term for British regulars, alluding to their severe discipline, which included lashing. Presumably the term lost its vogue after Washington got authority to increase lashing in the Continental Army to five hundred strokes.
"Bloody Backs." Encyclopedia of the American Revolution: Library of Military History. . Encyclopedia.com. (November 17, 2018). https://www.encyclopedia.com/history/encyclopedias-almanacs-transcripts-and-maps/bloody-backs
"Bloody Backs." Encyclopedia of the American Revolution: Library of Military History. . Retrieved November 17, 2018 from Encyclopedia.com: https://www.encyclopedia.com/history/encyclopedias-almanacs-transcripts-and-maps/bloody-backs