Sentence:  <WSD>Johnny</WSD> Rebs from the deep South who were plagued with diarrhoea after transfer to the Virginia front often informed their families that they were suffering from the `` the Virginia quickstep '' . 
Meaning of the word marked with <WSD> tags:  `Johnny' was applied as a nickname for Confederate soldiers by the Federal soldiers in the American Civil War; `greyback' derived from their grey Confederate uniforms