Which was not part of the irish experience on their arrival in the united states in the late 1840s and 1850s?

c

explanation:

i am pretty sure hopefully just you

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".