Conversation so far:
What was Pershings first job?
Troop L of the 6th U.S.
Cavalry stationed at Fort Bayard, in the New Mexico Territory.
How did he get into this job?
also became an expert marksman and, in 1891, was rated second in pistol and fifth in rifle out of all soldiers in the U.S.
Army.
How long was he with the U.S Cavalry?
In September 1891 he was assigned as the Professor of Military Science and Tactics at the University of Nebraska-Lincoln, a position he held until 1895.

Question: what did he do after that?
Self-contained rewrite: What did John J. Pershing do after the Professor of Military Science and Tactics position held until 1985?