What was fredrick olmstead best known for

Frederick Law Olmsted was a famous landscape architect in the late 1800s, who, in the midst of the Industrial Revolution designed and helped build a number of urban parks that helped people in urban areas retain a connection to nature.

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".