Sentence:  Johnny Rebs from the <WSD>deep</WSD> 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:  the southeastern region of the United States: South Carolina and Georgia and Alabama and Mississippi and Louisiana; prior to the American Civil War all these states produced cotton and permitted slavery