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. (March 22, 2019). https://www.encyclopedia.com/history/encyclopedias-almanacs-transcripts-and-maps/bloody-backs
"Bloody Backs." Encyclopedia of the American Revolution: Library of Military History. . Retrieved March 22, 2019 from Encyclopedia.com: https://www.encyclopedia.com/history/encyclopedias-almanacs-transcripts-and-maps/bloody-backs