I grew up in the deep south, Right near the border to Texas.
I am in the deep south also called the cotton states as that used to be the predominant crop
I have seen a lot of corn around so I thought it was that.
Historically it was to diffrentiate states that were dependent on slaves and plantations prior to the civil war
Well they are all free now so that is good.
When history books refer to deep south it is specifically Georgia , Alabama, Louisiana,Florida, Mississippi and Texas