Corn and wheat were the main cash crops of the

of the Midwest corn and wheat were the main cash crops.

Of the Midwest (APEX)

the answer is typhoon

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".